SMS Pumping

SMS pumping (also called artificially inflated traffic, AIT) is a fraud where attackers automate phone-number entry on websites that send an OTP or verification SMS, generating large volumes of paid A2P traffic to numbers in collusive ranges that share revenue with the fraudster. Mitigations include CAPTCHA, IP-based rate limiting, MSISDN range blocking, and anomaly detection on registration funnels.

Categories: Radio Access NetworkSignalingIdentity and Subscriber

SMS Pumping 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.

Signaling protocols carry the control-plane messages that set up calls, register subscribers and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA as top-tier telecom risk.

To place SMS Pumping in the wider telecom-security picture, review BTS Impersonation (Fake BTS), Cleartext (Plain Text), E911, OFCS, Rogue Base Station (Fake BTS) and UMTS — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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