AT&T COMMUNICATIONS SERVICES INTERNATIONAL INC.

AT&T Services, Inc.
GLEIF verified
Complete entity footprint
3 linked clusters · 4,591 netblocks · 241,247,929 IPv4 addresses
This organisation's clusters combined by evidence — shared operating domain attdns.com — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
LEI
549300OKSEZNCA9WAS16
Registered name
AT&T COMMUNICATIONS SERVICES INTERNATIONAL INC.
Jurisdiction
US-DE
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks135 · 12,667,004 IPv4 addresses
Cluster ID208784749
RegistryBGP
Owner jurisdictionUS-DE
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 549300OKSEZNCA9WAS16
Shared handles clustered on 19 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

5 weekly snapshots · JSON
130 +1 netblocks since 2026-07-05
2026-07-05 peak 130 2026-07-19

IP Ranges (135)

showing 50 of 135 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
12.153.241.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
67.98.173.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
72.157.240.0/21 AT&T Services, Inc. BGP ANNOUNCED ● high
72.157.248.0/21 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.64.0/19 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.96.0/19 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.146.0/23 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.148.0/22 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.152.0/22 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.156.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.158.0/23 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.160.0/21 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.168.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.208.0/20 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.208.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.209.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.224.0/20 AT&T Services, Inc. BGP ANNOUNCED ● high
139.76.8.0/21 AT&T Services, Inc. BGP ANNOUNCED ● high
139.76.53.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
139.76.64.0/18 AT&T Services, Inc. BGP ANNOUNCED ● high
139.76.224.0/19 AT&T Services, Inc. BGP ANNOUNCED ● high
144.160.0.0/15 AT&T Services, Inc. BGP ANNOUNCED ● high
170.35.208.0/20 AT&T Services, Inc. BGP ANNOUNCED ● high
170.35.224.0/20 AT&T Services, Inc. BGP ANNOUNCED ● high
192.150.169.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
198.180.219.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
204.107.19.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
12.206.0.0/16 AT&T Services, Inc. ARIN ALLOCATION ● low
129.245.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
130.1.0.0 – 130.10.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
130.48.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
132.201.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
134.85.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.16.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.21.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.25.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.28.0.0/15 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.31.0.0 – 135.34.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.37.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.38.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.40.0.0 – 135.52.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.54.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.57.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.58.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.59.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.61.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.62.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.63.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.65.0.0 – 135.73.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low
135.75.0.0 – 135.83.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● low

Domains hosted in this network

what's this?
att.net att.com firstnet.com sbc.com att-idns.net attdns.net

Network trust

what's this?
RPKI hygiene: C how networks compare →
51.1% of checked blocks have valid RPKI ROA coverage (69 of 135)
No discrepancies found among checked blocks.

NIC Handles

ABUSE7-ARIN AS11712 AS797 ATT-MNT ATTAB-ARIN ATTSE-Z ATTW DUMY-RIPE DUMY-RIPE F4-MNT FRC2-MNT ICC-ARIN +7 more