| Issuing ExTL | ExTR Ref. Number | Manufacturer | Standards covered | |
|---|
| 278 |  BAS - Baseefa |  |
| 12 | BKI - Testing Station for Explosion Proof Equipment | |
| 224 | BVS - DEKRA EXAM GmbH | |
| 2 | CCVE - NANIO "CCVE" | |
| 39 | CES - CESI | |
| 4 | CMExC - China National Quality Supervision & Test Centre | |
| 12 | CQST - China National Quality Supervision and Test | |
| 32 | CSA - CSA International | |
| 102 | DEK - DEKRA Certification B.V. | |
| 30 | DNV - DNV | |
| 10 | EPS - Bureau Veritas Consumer Products Services Germany GmbH | |
| 6 | ETL - Intertek | |
| 65 | FMG - FM Approvals LLC | |
| 23 | FTZU - Fyzikalne technicky zkusebni ustav | |
| 27 | IBE - IBExU Institut für Sicherheitstechnik GmbH | |
| 43 | INE - INERIS | |
| 3 | ITA - International Testing and Certification Services Pty. Ltd | |
| 7 | ITA - TUV Rheinland Australia Pty. Ltd | |
| 74 | ITS - Intertek Testing & Certification Limited | |
| 25 | KDB - Central Mining Institute Experimental Mine "Barbara" | |
| 35 | KEM - DEKRA Certification B.V. | |
| 1 | KEM - KEMA Quality B.V. | |
| 40 | KGS - Korea Gas Safety Corporation | |
| 22 | KOS - Korea Occupational Safety and Health Agency (KOSHA) | |
| 21 | KTL - Korea Testing Laboratory | |
| 139 | LCI - Laboratoire Central des Industries Electriques (LCIE) | |
| 1 | MST - Mine Safety Technology Centre (MSTC), | |
| 49 | NEM - NEMKO | |
| 14 | NEPSI - National Supervision and Inspection Centre for | |
| 31 | PCEC - Supervision & test Centre of Ex-products of | |
| 122 | PTB - Physikalisch-Technische Bundesanstalt (PTB) | |
| 7 | QPS - QPS | |
| 1 | SEV - Electrosuisse div. Testing and Certification | |
| 13 | SIM - Safety in Mines Testing and Research Station (Simtars) | |
| 5 | SIQ - Slovenian Institute of Quality and Metrology (SIQ) | |
| 334 | SIR - SIRA Certification Service | |
| 5 | SP - SP Technical Research Institute of Sweden | |
| 2 | TPS - TÜV SÜD Product Service GmbH | |
| 5 | TRC - TRaC EMC & Safety Ltd | |
| 7 | TRC - TRaC Global Ltd. | |
| 91 | TSA - TestSafe Australia | |
| 56 | TUN - TÜV NORD CERT GmbH | |
| 23 | TUR - TUV Rheinland Industrie Service GmbH | |
| 97 | UL - Underwriters Laboratories Inc (UL) | |
| 19 | ULD - UL International DEMKO A/S | |
| 19 | VTT - VTT Expert Services Ltd. | |
| 9 | ZLM - ZELM Explosionsschutz GmbH | |
| 2186 | | |