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Glossary

MSISDN (Mobile Subscriber ISDN Number) in 3GPP: meaning and where it is specified

Published 2026-10-16Updated 2026-10-16

At a glance

Term
MSISDN
Stands for
Mobile Subscriber ISDN Number
Defined in
3GPP TR 21.905 V19.2.0, clause 4
Used in
TS 23.003, TS 25.413, TS 32.298

In plain words

MSISDN stands for Mobile Subscriber ISDN Number. TS 23.003 has a clause titled Structure of Mobile Subscriber ISDN number (MSISDN). TS 32.298 says its served-party field contains "the mobile station ISDN number (MSISDN) of the served party.". In TS 25.413, the IE indicates the subscriber’s primary MSISDN for handling the SIPTO at Iu-PS function.

Source: 3GPP TS 32.298 V20.1.0, clause 5.1.2.1.80. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/32_series/32.298/32298-k10.zip

Sources

  1. 3GPP TR 21.905 V19.2.0, clause 4. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-j20.zip
  2. 3GPP TS 23.003 V20.1.0, clause 3.3. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/23_series/23.003/23003-k10.zip
  3. 3GPP TS 32.298 V20.1.0, clause 5.1.2.1.80. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/32_series/32.298/32298-k10.zip
  4. 3GPP TS 25.413 V19.0.0, clause 9.2.1.95. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/25_series/25.413/25413-j00.zip

How this page was made

The facts box comes straight from the 3GPP TDoc list and specification archive as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.