The following list contains all "accredited" teams. This list contains the same information as the list by countries, but is sorted by team names.
All "listed" teams are contained in the full list.
| 1A-CERT (FR) | France | Accredited since 16 Sep 2022 |
| A2A-CERT (IT) | Italy | Accredited since 24 May 2022 |
| AC-CSIRT (CZ) | Czech Republic | Accredited since 13 Mar 2024 |
| ACD-TRC (ES) | Spain | Accredited since 09 Apr 2024 |
| ACOnet-CERT | Austria | Accredited since 28 Mar 2003 |
| AEC | Austria | Certified since 30 Jun 2020 |
| aeCERT (AE) | United Arab Emirates | Accredited since 31 May 2022 |
| Ai CERT | France | Accredited since 27 May 2015 |
| AKCESK/NAECCS (AL) | Albania | Accredited since 27 May 2020 |
| ALEF-CSIRT | Czech Republic | Certified since 16 Jul 2020 |
| AM-CERT (AM) | Armenia | Accredited since 04 Jan 2024 |
| AndaluciaCERT | Spain | Accredited since 14 May 2018 |
| AR-CSIRT (PT) | Portugal | Accredited since 21 Feb 2023 |
| ATS-CSIRT (CZ) | Czech Republic | Accredited since 02 Sep 2024 |
| AXENTA CSIRT | Czech Republic | Accredited since 25 Feb 2019 |
| AzScienceCERT (AZ) | Azerbaijan | Accredited since 30 May 2011 |
| BARIKAT-CSIRT | Turkey | Accredited since 03 Mar 2022 |
| BASF gCERT | Germany | Accredited since 21 Nov 2022 |
| Bayern-CERT (DE) | Germany | Accredited since 15 Jul 2022 |
| BCR CERT (RO) | Romania | Accredited since 04 Jan 2024 |
| BELNET CERT | Belgium | Accredited since 14 Sep 2004 |
| BeSOC Madrid (ES) | Spain | Accredited since 01 Mar 2023 |
| BeSOC-Roma (IT) | Italy | Accreditation Suspended since 07 Dec 2024 |
| BF-SIRT | Sweden | Accredited since 19 Jun 2017 |
| BGD e-GOV CIRT | Bangladesh | Accredited since 28 Nov 2018 |
| Binconf CDC (SK) | Slovakia | Accredited since 20 Sep 2018 |
| Botswana-CSIRT (BW) | Botswana | Accredited since 30 Aug 2024 |
| BSS-CERT | Romania | Accredited since 14 Apr 2021 |
| Caixabank CSIRT (ES) | Spain | Accredited since 13 Jul 2017 |
| CARICERT | Curacao | Accredited since 26 May 2014 |
| CATALONIA-CERT (ES) | Spain | Accredited since 25 Dec 2010 |
| CCN-CERT | Spain | Accredited since 25 Jan 2008 |
| CDC AEC (CZ) | Czech Republic | Certification Candidate since 14 Jun 2024 |
| CERT ACL (PL) | Poland | Accredited since 22 Jun 2023 |
| CERT Alior | Poland | Accredited since 26 Aug 2019 |
| CERT ALLEGRO | Poland | Accredited since 21 Oct 2019 |
| CERT ATOS-FR (FR) | France | Accreditation Suspended since 01 Oct 2023 |
| CERT BIK | Poland | Accredited since 20 Nov 2020 |
| CERT Bulgaria | Bulgaria | Accredited since 12 Jul 2009 |
| CERT BWI | Germany | Certified since 21 Oct 2015 |
| CERT CM EI (FR) | France | Accredited since 17 Oct 2022 |
| CERT Credit Agricole | France | Certified since 08 Sep 2021 |
| CERT ENEA (PL) | Poland | Accredited since 13 Dec 2022 |
| CERT Groupe BPCE | France | Accredited since 03 May 2019 |
| CERT IT-PKP (PL) | Poland | Accredited since 22 Nov 2022 |
| CERT La Poste | France | Accredited since 27 Mar 2015 |
| CERT mBank | Poland | Accredited since 03 Nov 2017 |
| CERT NRW (DE) | Germany | Accredited since 17 Mar 2025 |
| CERT OPL | Poland | Certified since 14 Mar 2016 |
| CERT Orange Cyberdefense | France | Accredited since 21 Sep 2009 |
| CERT Orange Romania (RO) | Romania | Accredited since 10 May 2024 |
| CERT ORLEN | Poland | Accredited since 26 Feb 2021 |
| CERT PKO BP | Poland | Certified since 28 Jan 2020 |
| CERT POLSKA | Poland | Certified since 23 Sep 2020 |
| CERT PSE | Poland | Re-Certification Candidate since 10 May 2022 |
| CERT Radical (EC) | Ecuador | Accredited since 18 Oct 2024 |
| CERT RS (RS) | Bosnia Hercegovina | Accredited since 16 Apr 2020 |
| CERT SG | France | Accredited since 12 Nov 2018 |
| CERT SysDream (FR) | France | Accredited since 15 Sep 2022 |
| CERT TMPL | Poland | Accredited since 31 Aug 2018 |
| CERT-AA (DE) | Germany | Accredited since 21 Jan 2025 |
| CERT-AGID | Italy | Accredited since 19 Jul 2016 |
| CERT-AKAOMA (FR) | France | Accredited since 19 Jul 2024 |
| CERT-AM | Armenia | Accredited since 13 Jan 2014 |
| CERT-BDF | France | Accredited since 09 Apr 2015 |
| CERT-Bund | Germany | Accredited since 12 Sep 2012 |
| CERT-C Capgemini Group (FR) | France | Accredited since 09 Jun 2023 |
| CERT-CDCFR | France | Accredited since 23 May 2016 |
| CERT-DVT | France | Accredited since 01 Feb 2011 |
| CERT-EE | Estonia | Certified since 20 Sep 2017 |
| CERT-ENAV | Italy | Accredited since 26 Apr 2018 |
| CERT-EU | *European Union | Accredited since 02 May 2013 |
| CERT-GIB | Singapore | Accredited since 15 Jan 2013 |
| CERT-GOV-MD | Moldova, Republic Of | Accredited since 13 Jan 2014 |
| CERT-In (IN) | India | Accredited since 13 Sep 2022 |
| CERT-INN (IT) | Italy | Accredited since 20 Sep 2023 |
| CERT-IS (IS) | Iceland | Accredited since 17 May 2023 |
| Cert-IST | France | Accredited since 14 Mar 2006 |
| CERT-MC (MC) | Monaco | Accredited since 12 Jul 2022 |
| CERT-MU (MU) | Mauritius | Certified since 14 May 2024 |
| CERT-Post | Switzerland | Accredited since 21 Oct 2019 |
| CERT-Renater | France | Accredited since 30 Sep 2001 |
| CERT-SE (SE) | Sweden | Certified since 16 Nov 2011 |
| CERT-Ubisoft | France | Accredited since 07 Jul 2020 |
| CERT-VW | Germany | Accredited since 02 Dec 2003 |
| CERT-W | France | Accredited since 07 Jul 2014 |
| CERT-WM (NL) | Netherlands | Accredited since 03 Dec 2024 |
| CERT-WuerthPhoenix (IT) | Italy | Accredited since 17 Apr 2023 |
| CERT-XMCO (FR) | France | Accredited since 31 Aug 2018 |
| CERT-Yoroi | Italy | Certified since 29 Dec 2020 |
| CERT.at | Austria | Certified since 05 Feb 2018 |
| CERT.AZ | Azerbaijan | Accredited since 20 Jan 2015 |
| CERT.be | Belgium | Accredited since 22 Jan 2010 |
| CERT.br | Brazil | Accredited since 31 Mar 2020 |
| CERT.DGA.GOV.GE | Georgia | Accredited since 24 May 2012 |
| CERT.GOV.AZ | Azerbaijan | Accredited since 17 Aug 2012 |
| CERT.hr | Croatia | Accredited since 22 Jan 2010 |
| CERT.LV (LV) | Latvia | Certified since 01 Sep 2016 |
| CERT.NETWORKS.PL (PL) | Poland | Accredited since 14 Sep 2023 |
| CERT.PT | Portugal | Certified since 17 Feb 2022 |
| CERTBI | Italy | Certified since 13 Jan 2025 |
| CERTEGO | Italy | Certification Candidate since 14 Dec 2023 |
| CERTFin (IT) | Italy | Accredited since 02 Oct 2019 |
| CESNET-CERTS | Czech Republic | Accredited since 27 Jan 2008 |
| CFCS | Denmark | Accredited since 12 Oct 2011 |
| CIES CSIRT | Spain | Accredited since 27 Jan 2022 |
| CIPHER-CSIRT | Portugal | Certified since 10 Dec 2019 |
| CIRCL | Luxembourg | Accredited since 19 Sep 2011 |
| CiviCERT | *World Wide | Accredited since 24 Mar 2016 |
| ComCERT.PL | Poland | Accredited since 02 Jun 2016 |
| Computest-CERT (NL) | Netherlands | Accredited since 30 Nov 2022 |
| CORIS-STS | Romania | Accredited since 30 May 2011 |
| CS-CSIRT | Czech Republic | Accredited since 23 Jan 2019 |
| CSA Global CSIRT (ES) | *European Union | Accredited since 23 Oct 2024 |
| CSGN-CERT | Romania | Accredited since 04 Feb 2015 |
| CSI-RT | Italy | Accredited since 07 Jul 2021 |
| CSIRT CSAS | Czech Republic | Re-Certification Candidate since 30 Aug 2024 |
| CSIRT KNF (PL) | Poland | Accredited since 07 Jul 2021 |
| CSIRT-AD (AD) | Andorra | Accredited since 17 Apr 2023 |
| CSIRT-BOS (PL) | Poland | Accredited since 27 Jun 2023 |
| CSIRT-CV | Spain | Accredited since 27 Sep 2011 |
| CSIRT-DCeGOV (CZ) | Czech Republic | Accredited since 14 Jan 2025 |
| CSIRT-Equans (FR) | France | Accredited since 12 Mar 2025 |
| CSIRT-IE | Ireland | Accredited since 28 Nov 2017 |
| CSIRT-IT | Italy | Accredited since 24 May 2022 |
| CSIRT-MU (CZ) | Czech Republic | Re-Certification Candidate since 10 Jan 2024 |
| CSIRT-NBU (UA) | Ukraine | Accredited since 16 Jul 2024 |
| CSIRT-NEOSOFT (FR) | France | Accredited since 20 Jul 2017 |
| CSIRT-SATEC (ES) | Spain | Accredited since 13 Nov 2022 |
| CSIRT-SPCSS (CZ) | Czech Republic | Certification Candidate since 21 Sep 2024 |
| CSIRT-UPJS | Slovakia | Accredited since 19 Oct 2020 |
| CSIRT-VUT (CZ) | Czech Republic | Accredited since 18 Sep 2022 |
| CSIRT.CZ | Czech Republic | Certified since 16 Nov 2018 |
| CSIRT.gal | Spain | Accredited since 10 Aug 2021 |
| CSIRT.MIL.SK | Slovakia | Accredited since 12 Feb 2018 |
| CSIRT.SK | Slovakia | Certification Candidate since 19 Sep 2024 |
| CSIRT.UPORTO | Portugal | Accredited since 01 Jul 2007 |
| csirtMEO (PT) | Portugal | Accredited since 06 Apr 2012 |
| CSOC LKPR (CZ) | Czech Republic | Accredited since 05 Jun 2024 |
| CSOC-ARIA (IT) | Italy | Accredited since 09 Feb 2024 |
| CSUC-CSIRT | Spain | Accredited since 13 Jan 2015 |
| CYBER CIRCLE CSIRT (LV) | Latvia | Accredited since 17 Apr 2023 |
| Cyberzaintza (ES) | Spain | Accredited since 30 Apr 2021 |
| CYMED (RO) | Romania | Accredited since 05 Feb 2021 |
| CYNET-CSIRT | Cyprus | Accredited since 19 Aug 2021 |
| CZ.NIC-CSIRT | Czech Republic | Accredited since 26 Aug 2010 |
| DBG-CERT (DE) | Germany | Accredited since 02 Jul 2020 |
| DELOITTE EDC (ES) | Spain | Accredited since 18 Jul 2023 |
| Deutsche Telekom CERT | Germany | Certified since 16 Jul 2020 |
| DFN-CERT | Germany | Re-Certification Candidate since 03 Jun 2021 |
| DKCERT | Denmark | Certified since 26 Feb 2024 |
| DNSC | Romania | Accredited since 09 Mar 2012 |
| Dubex IRT (DK) | Denmark | Accredited since 05 Jul 2024 |
| E.ON CERT | Germany | Accredited since 13 Oct 2015 |
| E.ON CERT PL | Poland | Accredited since 31 Aug 2021 |
| EATM-CERT | Belgium | Accredited since 19 Mar 2020 |
| EC Cybersecurity Operations Centre | *European Union | Accredited since 15 Nov 2019 |
| EDF CIRC | Estonia | Accredited since 10 Jun 2016 |
| eduCSC-NO (NO) | Norway | Certified since 31 Jan 2014 |
| EGI CSIRT | *Europe | Certified since 02 Oct 2014 |
| EL-CSIRT (IT) | Italy | Accredited since 05 Jan 2024 |
| Enel CERT (IT) | Italy | Accredited since 29 May 2018 |
| ENERGOTEL.SK-CSIRT | Slovakia | Accredited since 13 Nov 2022 |
| ENOC-CSIRT (ES) | Spain | Accredited since 21 Jun 2022 |
| Ericsson PSIRT | Finland | Accredited since 25 Nov 2005 |
| ERIS-CERT (ES) | Spain | Accredited since 25 Jun 2018 |
| ESACERT | *Europe | Certified since 30 Apr 2021 |
| esCERT-UPC (ES) | Spain | Accredited since 30 Sep 2001 |
| ESP DEF CERT | Spain | Accredited since 18 Jul 2013 |
| ETDA (TH) | Thailand | Accredited since 01 Oct 2015 |
| ETH CSIRT (CH) | Switzerland | Re-Certification Candidate since 24 Feb 2021 |
| Eurofins SOC (PL) | Poland | Accredited since 14 Nov 2023 |
| Euronext CSIRT | Portugal | Accredited since 18 Dec 2019 |
| EXN-GSOC (BE) | Belgium | Certified since 10 Jan 2024 |
| EY CSIRT (FR) | France | Accredited since 16 Nov 2022 |
| FoxCERT | Netherlands | Accredited since 01 Oct 2014 |
| FS-CERT (IT) | Italy | Accreditation Suspended since 30 Sep 2024 |
| Funet CERT | Finland | Accredited since 21 Apr 2002 |
| G-SIRT | Italy | Accredited since 07 Feb 2020 |
| GARR-CERT (IT) | Italy | Accredited since 01 Jan 2001 |
| GAZ-SYSTEM CERT | Poland | Re-Certification Candidate since 02 Sep 2024 |
| GC-CSIRT (SE) | Sweden | Accredited since 23 Aug 2023 |
| GEANT CERT | *Europe | Certified since 22 Jun 2015 |
| gematik CERT (DE) | Germany | Accredited since 16 Apr 2024 |
| Gen CERT (CZ) | Czech Republic | Accredited since 14 Dec 2020 |
| GovCERT Austria | Austria | Accredited since 29 Jun 2021 |
| GovCERT.ch | Switzerland | Accredited since 21 Aug 2014 |
| GOVCERT.CZ | Czech Republic | Accredited since 21 Aug 2014 |
| GOVCERT.LU | Luxembourg | Certified since 26 Sep 2024 |
| govmtCSIRT (MT) | Malta | Accredited since 24 May 2004 |
| GRAIL-CSIRT (ES) | Spain | Accredited since 28 Jul 2023 |
| GRNET-CERT | Greece | Accredited since 07 Apr 2003 |
| Handelsbanken SIRT | Sweden | Accredited since 09 Jan 2012 |
| HealthNet-CSIRT | Luxembourg | Accredited since 29 Nov 2017 |
| HWG-CERT (IT) | Italy | Certification Candidate since 10 Jul 2024 |
| IBD | Netherlands | Certification Candidate since 06 Feb 2024 |
| IGNITIS CERT (LT) | Lithuania | Accredited since 16 Sep 2022 |
| INCIBE-CERT | Spain | Certified since 26 Feb 2024 |
| Infineon CDC | Germany | Certified since 26 Feb 2024 |
| Innotec Security (ES) | Spain | Accredited since 14 Oct 2016 |
| IRISSCERT | Ireland | Accredited since 16 May 2010 |
| IstroCSIRT (SK) | Slovakia | Accredited since 17 Sep 2022 |
| itm8 CDC (DK) | Denmark | Certification Candidate since 10 Apr 2024 |
| itm8 CSIRT (DK) | Denmark | Certification Candidate since 03 Apr 2025 |
| ITXCSIRT (ES) | Spain | Accredited since 23 Sep 2022 |
| JCSC (JE) | Jersey | Accredited since 03 Nov 2023 |
| Jisc CSIRT (UK) | United Kingdom | Accredited since 01 Jan 2001 |
| JN DATA CDC | Denmark | Certified since 18 Dec 2020 |
| Jo-FinCERT (JO) | Jordan | Accredited since 13 Mar 2024 |
| KBC Group CERT | Belgium | Accredited since 22 Feb 2016 |
| Kering-CERT (FR) | France | Accredited since 17 May 2024 |
| Kindred-CSIRT (SE) | Sweden | Accredited since 02 May 2022 |
| KIT-CERT | Germany | Certified since 26 Sep 2024 |
| KOS-CERT | Kosovo, Republic Of | Accredited since 03 Jul 2017 |
| KPN-CERT | Netherlands | Certified since 27 Mar 2012 |
| KraftCERT | Norway | Certified since 15 Mar 2021 |
| KrCERT/CC (KR) | Korea, Republic Of | Certified since 26 Feb 2024 |
| KVTC-CERT | Lithuania | Accredited since 19 Oct 2009 |
| KZ-CERT | Kazakhstan | Accreditation Suspended since 05 Oct 2023 |
| LAYER8 CSIRT (PT) | Portugal | Accredited since 30 Nov 2022 |
| LDO-CERT | Italy | Accredited since 21 Jun 2019 |
| LE-CERT | Spain | Accredited since 28 Jan 2021 |
| LION-CSIRT (IT) | Italy | Accredited since 31 May 2024 |
| LITNET CERT | Lithuania | Accredited since 27 Jan 2005 |
| LiU IRT | Sweden | Certified since 07 Nov 2014 |
| mIRT | Norway | Accredited since 08 May 2017 |
| MKD-CIRT | North Macedonia | Accredited since 08 Dec 2017 |
| MUP CERT | Serbia | Accredited since 23 Nov 2018 |
| MYCD-CERT (ES) | Spain | Accredited since 26 Jul 2024 |
| NAIS G-CSIRT (AL) | Albania | Accredited since 08 Jan 2025 |
| National CSIRT-CY (CY) | Cyprus | Accredited since 21 Jun 2018 |
| National Cybersecurity Authority (SA) | Saudi Arabia | Accredited since 15 Jun 2020 |
| NavCERT | France | Accredited since 20 Apr 2020 |
| NCSC (UK) | United Kingdom | Accreditation Suspended since 28 Jan 2020 |
| NCSC-FI | Finland | Re-Certification Candidate since 22 Jan 2025 |
| NCSC-Hungary | Hungary | Accredited since 14 Feb 2006 |
| NCSC-NL | Netherlands | Certified since 26 Nov 2010 |
| NCSC-NO | Norway | Accredited since 26 Jan 2007 |
| NCZI CSIRT (SK) | Slovakia | Accredited since 11 Dec 2024 |
| NESTOR (CZ) | Czech Republic | Certified since 13 Jan 2025 |
| NEXI CDC (IT) | Italy | Accredited since 10 Jun 2020 |
| NKSC/CERT-LT | Lithuania | Accredited since 16 Jan 2009 |
| NN-GROUP CSIRT | Czech Republic | Accredited since 05 Nov 2020 |
| NORDUnet CERT | *Europe | Re-Certification Candidate since 17 Feb 2025 |
| NRD CIRT | Lithuania | Accredited since 03 Mar 2017 |
| NVISO-CSIRT | Belgium | Accredited since 09 Apr 2018 |
| NW-CERT | Netherlands | Accredited since 31 Mar 2021 |
| O2.cz CERT (CZ) | Czech Republic | Accredited since 21 Nov 2023 |
| OBRELA-CSIRT (GR) | Greece | Accredited since 22 Nov 2024 |
| OCINT-CSIRT (CH) | Switzerland | Accredited since 06 Jun 2024 |
| Omni (RO) | Romania | Accredited since 26 Sep 2024 |
| OneCyber CERT (ES) | Spain | Accredited since 05 Jul 2024 |
| OneseQ CERT (ES) | Spain | Accredited since 16 Sep 2022 |
| OS-CERT (CH) | Switzerland | Accredited since 14 Nov 2016 |
| OxCERT | United Kingdom | Accredited since 26 Mar 2019 |
| Panasonic PSIRT | Japan | Accredited since 19 Aug 2013 |
| PGE-CERT (PL) | Poland | Re-Certification Candidate since 10 May 2022 |
| PGGM-CERT | Netherlands | Accredited since 10 Jun 2021 |
| PI-CERT (IT) | Italy | Accredited since 03 Dec 2013 |
| PIONIER-CERT (PL) | Poland | Accredited since 09 Feb 2024 |
| POLI-CERT (IT) | Italy | Accredited since 05 Aug 2021 |
| PRE-CERT | Germany | Accredited since 12 Jun 2002 |
| PXS-CSIRT | Belgium | Re-Certification Candidate since 08 Nov 2023 |
| PXS-LU-CSIRT (LU) | Luxembourg | Accredited since 25 Mar 2016 |
| Rapid7 CSIRT (US) | United States | Accredited since 20 Mar 2025 |
| RCTS CERT | Portugal | Re-Certification Candidate since 11 Oct 2024 |
| RedIRIS | Spain | Accredited since 23 Mar 2001 |
| RESTENA-CSIRT | Luxembourg | Accredited since 21 Apr 2009 |
| RevelSi CSIRT (RO) | Romania | Accredited since 18 Jun 2022 |
| RH-ISIRT | *World Wide | Accredited since 05 Jun 2018 |
| RIPE NCC CSIRT | Netherlands | Accredited since 15 Dec 2014 |
| RNIDS-CERT (RS) | Serbia | Accredited since 04 Sep 2023 |
| RoCSIRT (RO) | Romania | Accredited since 12 Jul 2009 |
| RU-CERT | Russian Federation | Accreditation Suspended since 28 Feb 2022 |
| RUS-CERT | Germany | Accredited since 15 Mar 2002 |
| S-CERT | Germany | Accredited since 10 Oct 2002 |
| S2 Grupo CERT (ES) | Spain | Accredited since 19 Apr 2016 |
| S21sec CERT | Spain | Accredited since 19 Sep 2011 |
| SA NREN CSIRT | South Africa | Accredited since 15 Nov 2018 |
| SAND-CSIRT | *World Wide | Accredited since 16 Jul 2020 |
| SBAB-SIRT | Sweden | Accredited since 10 Jul 2017 |
| sCERT AT | Austria | Accredited since 16 Jan 2020 |
| SEB CSIRT (SE) | Sweden | Accredited since 23 Sep 2016 |
| SektorCERT (DK) | Denmark | Accredited since 23 Aug 2021 |
| SentorSOC (SE) | Sweden | Accredited since 16 Oct 2024 |
| SHARE CERT | Serbia | Accredited since 28 Dec 2018 |
| SI-CERT | Slovenia | Accredited since 03 Jul 2001 |
| Siemens CERT | Germany | Accredited since 23 Mar 2001 |
| SIGOV-CERT (SI) | Slovenia | Accredited since 10 Jul 2024 |
| SK-CERT | Slovakia | Certified since 26 Mar 2020 |
| SmartSOC (PL) | Poland | Accredited since 18 Dec 2024 |
| SOC Thein (CZ) | Czech Republic | Accredited since 19 Mar 2025 |
| SOC Trecom (PL) | Poland | Accredited since 03 Apr 2024 |
| SOC-Corpus | Czech Republic | Accredited since 24 Oct 2018 |
| SOC-GSE | Italy | Accredited since 23 Nov 2017 |
| SOC24.PL | Poland | Accredited since 28 Jan 2019 |
| SOC365 CSIRT (CZ) | Czech Republic | Accredited since 23 Dec 2022 |
| SOCA | Czech Republic | Accredited since 10 Feb 2017 |
| Sorint.SEC (IT) | Italy | Accredited since 16 Oct 2024 |
| SPCS CSIRT (CH) | Switzerland | Accredited since 10 May 2024 |
| SRB-CERT | Serbia | Accredited since 09 Aug 2019 |
| StACSIRT | United Kingdom | Accredited since 19 Jan 2018 |
| STI CERT | Romania | Accredited since 20 Nov 2015 |
| SUNET CERT | Sweden | Accredited since 23 May 2002 |
| SURFcert | Netherlands | Certified since 25 Aug 2023 |
| Swedbank CDC | Sweden | Certified since 20 Sep 2023 |
| SWITCH-CERT | Switzerland | Certified since 02 Jun 2011 |
| SZ SOC (CZ) | Czech Republic | Accredited since 07 Aug 2024 |
| TCS-CERT (LU) | Luxembourg | Certified since 31 Aug 2023 |
| TDC NET CDC (DK) | Denmark | Certified since 20 Sep 2023 |
| Team Cymru | *World Wide | Accredited since 26 Aug 2010 |
| TeliaCERT | Sweden | Certified since 29 Sep 2011 |
| TERNA-CERT | Italy | Accredited since 06 May 2019 |
| THA-CERT | *World Wide | Accredited since 18 Sep 2017 |
| tk CERT | Germany | Accredited since 05 Feb 2014 |
| TMCZ CSIRT | Czech Republic | Accredited since 16 Feb 2021 |
| TR-CERT | Turkey | Accredited since 17 Jun 2008 |
| Truesec-CSIRT (SE) | Sweden | Certified since 31 Aug 2023 |
| TS CSIRT | Czech Republic | Accredited since 28 Feb 2020 |
| TSLO-CERT (SI) | Slovenia | Accredited since 02 Jun 2021 |
| TurkTelekom-CSIRT (TR) | Turkey | Accredited since 27 Aug 2019 |
| UBT-CERT | Kosovo, Republic Of | Accredited since 01 Aug 2018 |
| UiO-CERT | Norway | Certified since 26 Feb 2024 |
| ULAK-CSIRT | Turkey | Accredited since 14 Jul 2007 |
| UNICOM CERT (RS) | Serbia | Accredited since 21 Apr 2022 |
| UniMS-CERT (DE) | Germany | Accredited since 19 May 2021 |
| UNT-CERT (IT) | Italy | Accredited since 17 Apr 2023 |
| UU-CSIRT | Sweden | Accredited since 09 Oct 2015 |
| VDE | Germany | Accredited since 03 Feb 2018 |
| Versia-CSIRT (ES) | Spain | Accredited since 24 May 2023 |
| VINCI-CERT | France | Accredited since 02 Oct 2020 |
| VOID SOC | Slovakia | Accredited since 01 Nov 2019 |
| WienCERT | Austria | Re-Certification Candidate since 04 Dec 2020 |
| XING (DE) | Germany | Accredited since 26 Mar 2014 |
| Z-CERT (NL) | Netherlands | Certified since 27 Feb 2025 |