AT&T COMMUNICATIONS SERVICES INTERNATIONAL INC.

AT&T Services, Inc.
Data as of 2026-08-09
GLEIF verified
Complete entity footprint
5 linked clusters · 4,525 netblocks · 122,157,392 IPv4 addresses · 394 IPv6 prefixes
This organisation's clusters combined by evidence — shared GLEIF corporate family and 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
Netblocks150 · 12,475,136 IPv4 addresses
IPv6 3 prefixes (largest 2a01:e284::/32)
All fragments 155 blocks across 3 clusters
Cluster ID217797192
RegistryBGP
Owner jurisdictionUS-DE
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 549300OKSEZNCA9WAS16
Shared handles clustered on 24 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
153 +24 netblocks since 2026-07-05
2026-07-05 peak 153 2026-08-09

IP Ranges (150)

showing 50 of 150 — see all — ⬇ export CSV
CIDR Org name Registry Status Confidence
12.153.241.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
12.206.0.0/16 AT&T Services, Inc. ARIN ALLOCATION ● 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
130.1.0.0 – 130.10.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.40.0.0 – 135.52.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.65.0.0 – 135.73.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.75.0.0 – 135.83.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.94.0.0 – 135.102.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.143.0.0 – 135.147.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.150.0.0 – 135.154.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.160.0.0 – 135.168.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.172.0.0 – 135.179.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● high
135.186.0.0 – 135.195.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● 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
135.209.208.0/24 AT&T Services, Inc. BGP ANNOUNCED ● high
135.209.208.0/20 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
207.140.0.0/24 AT&T Services, Inc. ARIN ALLOCATION ● high
207.242.0.0/23 AT&T Services, Inc. ARIN ALLOCATION ● high
129.245.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
130.48.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
132.201.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
134.85.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.16.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.21.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.25.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.28.0.0/15 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.31.0.0 – 135.34.255.255 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium
135.37.0.0/16 AT&T Services, Inc. ARIN DIRECT ALLOCATION ● medium

IPv6 ranges (3)

CIDR
2a01:e284::/32
2a01:e285::/32
2a0f:9407::/32

Domains hosted in this network

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

Corporate group (3 confirmed entities)

Network trust

what's this?
RPKI hygiene: D how networks compare →
45.1% of checked blocks have valid RPKI ROA coverage (69 of 153)
No discrepancies found among checked blocks.

NIC Handles

ABUSE7-ARIN ABUSE7-ARIN AS11712 AS797 ATT-MNT ATTAB-ARIN ATTSE-Z ATTSE-Z ATTW DUMY-RIPE DUMY-RIPE F4-MNT +12 more