Telecom Reconnaissance

In telecommunications, Telecom Reconnaissance is the pre-attack phase where an adversary maps targets such as global title ranges, point codes, PLMN identifiers, exposed signaling endpoints, and reachable Network Functions. Sources include public IR.21 documents, leaked routing data, BGP/IPX observations, and probing of SS7, Diameter, GTP, and SBA interfaces.

Categories: Radio Access NetworkCore NetworkSignaling

Telecom Reconnaissance in context

The radio access network is the layer where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations, downgrade attacks and jamming, and defenses hinge on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

The mobile core is where subscriber sessions, mobility and policy live. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF. Core exposure is the difference between a single-subscriber leak and a fleet-wide breach.

To place Telecom Reconnaissance in the wider telecom-security picture, review Fuzzing, Threat Hunting (Telecom), Patch Management, Risk Assessment, 5G Reference Points and 5G SA.

Related terms

Related topic hubs

  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.
  • SS7 Security SS7/MAP/CAP/SCCP attacks and defenses across 2G/3G interconnect.
  • SS7 Firewall GSMA FS.11 category 1/2/3 SS7 message screening at the STP edge.
  • Diameter Security 4G/LTE Diameter threats across IPX/roaming and DEA defenses.

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.