| Issuing ExTL | ExTR Ref. Number | Manufacturer | Standards covered | |
|---|
| 256 |  BAS - Baseefa |  |
| 31 | BAS - SGS Baseefa Limited | |
| 6 | BKI - Testing Station for Explosion Proof Equipment | |
| 202 | BVS - DEKRA EXAM GmbH | |
| 3 | CCVE - NANIO "CCVE" | |
| 35 | CES - CESI | |
| 18 | CQST - China National Quality Supervision and Test | |
| 50 | CSA - CSA International | |
| 161 | DEK - DEKRA Certification B.V. | |
| 21 | DNV - DNV | |
| 52 | EPS - Bureau Veritas Consumer Products Services Germany GmbH | |
| 15 | ETL - Intertek | |
| 107 | FMG - FM Approvals LLC | |
| 31 | FTZU - Fyzikalne technicky zkusebni ustav | |
| 44 | IBE - IBExU Institut für Sicherheitstechnik GmbH | |
| 67 | INE - INERIS | |
| 26 | ITA - TUV Rheinland Australia Pty. Ltd | |
| 62 | ITS - Intertek Testing & Certification Limited | |
| 8 | KDB - Central Mining Institute Experimental Mine "Barbara" | |
| 9 | KDB - Główny Instytut Górnictwa, Kopalnia Doświadczalna „BARBARA” | |
| 27 | KEM - DEKRA Certification B.V. | |
| 35 | KGS - Korea Gas Safety Corporation | |
| 3 | KOS - Korea Occupational Safety and Health Agency (KOSHA) | |
| 15 | KTL - Korea Testing Laboratory | |
| 68 | LCI - Laboratoire Central des Industries Electriques (LCIE) | |
| 32 | LCIE - Laboratoire Central des Industries Electriques (LCIE) | |
| 2 | MST - Mine Safety Technology Centre (MSTC), | |
| 27 | NEM - NEMKO | |
| 21 | NEPSI - National Supervision and Inspection Centre for | |
| 32 | PCEC - Supervision & test Centre of Ex-products of | |
| 138 | PTB - Physikalisch-Technische Bundesanstalt (PTB) | |
| 6 | QPS - QPS | |
| 14 | SEV - Electrosuisse div. Testing and Certification | |
| 14 | SIM - Safety in Mines Testing and Research Station (Simtars) | |
| 1 | SIQ - Slovenian Institute of Quality and Metrology (SIQ) | |
| 348 | SIR - SIRA Certification Service | |
| 3 | SP - SP Technical Research Institute of Sweden | |
| 1 | TPS - TÜV SÜD Product Service GmbH | |
| 1 | TRC - TRaC EMC & Safety Ltd | |
| 35 | TRC - TRaC Global Ltd. | |
| 49 | TSA - TestSafe Australia | |
| 49 | TUN - TÜV NORD CERT GmbH | |
| 24 | TUR - TUV Rheinland Industrie Service GmbH | |
| 129 | UL - UL LLC | |
| 1 | UL - Underwriters Laboratories Inc (UL) | |
| 22 | ULD - UL International DEMKO A/S | |
| 18 | VTT - VTT Expert Services Ltd. | |
| 16 | ZLM - ZELM Explosionsschutz GmbH | |
| 2335 | | |