AT&T · United States

AT&T is a mobile network operator in the United States and part of AT&T Inc. The registry records nine ASNs for the group, five with a confirmed mobile role, of which only AS20057 announced address space at the last probe. Eleven MCC/MNC pairs are recorded, from 310/070 to 312/670.

Research note. Consumer mobile network is operated by AT&T Mobility LLC, which the AT&T Consumer Service Agreement identifies as 'AT&T Mobility LLC, acting on behalf of its FCC-licensed affiliates doing business as AT&T'. ASNs were taken from the full ARIN list for AT&T's ARIN org handle AEL-360 (70 ASNs) rather than from the noisy name-match candidate list; the candidate list's university and Verizon entries (AS18, AS25, AS104, AS1688) were rejected. AS20057 is the ASN that carries the consumer mobile network (1,635 announced prefixes as of 2026-09-06). AS16572, AS17258, AS19540 and AS27522 are registered to AT&T Mobility but are NOT currently announced in BGP (RIPEstat announced=false), so they should not be expected in live routing data; AS46164 (ATT-MOBILITY-LABS) is likewise unannounced and was omitted. AS7018 and AS6389 are the fixed/broadband and backbone networks, AS2685/AS2686 are AT&T Global Network Services (enterprise/managed). MCC/MNC rows: the candidate rows 310/380, 310/560 and 310/016 are listed as NOT operational and were dropped; candidate row 310/980 was rejected outright - it belongs to Peoples Telephone / Texas RSA 7B3 (spectrum later sold to AT&T), not to AT&T Mobility; candidate row '310/38' is a malformed duplicate of 310/380 and was dropped. 312/670 is FirstNet, whose operator of record is AT&T Mobility; the further FirstNet codes 313/100-313/190 are listed under 'AT&T FirstNet' / '700 MHz Public Safety Broadband' and were left out of this list. parentGroup 'AT&T Inc.' is the SEC registrant (CIK 0000732717) for the AT&T group.

curl -s "https://stat.ripe.net/data/prefix-overview/data.json?resource=203.0.113.9" | jq '.data.asns'

whois -h whois.radb.net -- '-i origin AS16572' | grep ^route