MNO (Mobile Network Operator)

A telecommunications carrier that owns and operates mobile network infrastructure including licensed radio spectrum, base stations, core network elements, and subscriber management systems. MNOs provide mobile services directly to end users and may also provide wholesale access to MVNOs. MNOs are responsible for network security, regulatory compliance, and service quality.

Categories: Radio Access NetworkCore NetworkIdentity and Subscriber

MNO in context

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

The mobile core carries subscriber sessions, mobility and policy. 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.

To place MNO in the wider telecom-security picture, review UPF, Zero Trust (Telecom), MCC, MNC, Mobile Network and MVNO: each entry cross-references back to this page so you can walk the topic in either direction.

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