COMCAST CORPORATION

Comcast Cable Communications, LLC
Data as of 2026-08-16
GLEIF verified
Complete entity footprint
5 linked clusters · 4,550 netblocks · 79,440,949 IPv4 addresses · 3,184 IPv6 prefixes
This organisation's clusters combined by evidence — shared GLEIF corporate family and shared operating domain comcast.net — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
LEI
51M0QTTNCGUN7KFCFZ59
Registered name
COMCAST CORPORATION
Jurisdiction
US-PA
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks4,367 · 70,803,248 IPv4 addresses
IPv6 3,137 prefixes (largest 2601::/20)
Registered in United States (1,220) · Canada (9) · Japan (5) · Ukraine (4) · MD (4) · Hungary (2)
All fragments 4,442 blocks across 15 clusters
Cluster ID222371084
RegistryBGP
Owner jurisdictionUS-PA
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 51M0QTTNCGUN7KFCFZ59
Shared handles clustered on 100 shared RIR contact/maintainer handles
Registry names 15 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

8 weekly snapshots · JSON
4,390 +332 netblocks since 2026-07-05
2026-07-05 peak 4,399 2026-08-16

IP Ranges (4,367)

showing 50 of 4,367 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
5.182.186.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.187.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.192.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.193.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.194.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.195.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
5.182.198.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
9.142.48.0/20 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
9.142.96.0/19 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
9.142.118.0/23 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
23.249.160.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
23.249.170.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.0.0.0/16 Comcast Cable Communications, Inc. ARIN ASSIGNMENT ● high
24.16.0.0/14 Comcast Cable Communications ARIN ASSIGNMENT ● high
24.30.0.0/18 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.34.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.60.0.0/15 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.75.216.0/22 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.91.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.98.0.0/16 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.104.46.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.58.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.72.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.73.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.75.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.124.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.138.0/23 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.143.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.146.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.150.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.104.156.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
24.118.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.124.128.0/17 Comcast Cable Communications, LLC ARIN ASSIGNMENT ● high
24.125.0.0/17 Comcast Cable Communications, LLC ARIN ASSIGNMENT ● high
24.126.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.128.0.0/17 Comcast Cable Communications, LLC ARIN ASSIGNMENT ● high
24.129.0.0/18 Comcast Cable Communications, LLC ARIN ASSIGNMENT ● high
24.130.0.0/16 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.147.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.153.64.0/19 Comcast Cable Communications, LLC ARIN ASSIGNMENT ● high
24.218.0.0/17 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
24.245.0.0/19 Comcast Cable Communications Holdings, Inc ARIN ASSIGNMENT ● high
31.132.52.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
31.132.53.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
31.132.54.0/23 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
36.255.213.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
36.255.214.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
36.255.215.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
45.58.210.0/23 Comcast Cable Communications, LLC BGP ANNOUNCED ● high
45.58.244.0/24 Comcast Cable Communications, LLC BGP ANNOUNCED ● high

IPv6 ranges (3,137)

showing the 15 largest allocations
CIDR
2601::/20
2603:2000::/20
2603:3000::/24
2001:558::/29
2a0c:1900::/29
2620:10a:6000::/44
2001:558:4000::/48
2001:558:4001::/48
2001:558:4002::/48
2001:558:4003::/48
2001:558:4010::/48
2001:558:4011::/48
2001:558:4012::/48
2001:558:4013::/48
2001:558:4020::/48

Domains hosted in this network

what's this?
comcast.net xfinity.com comcast.com xumo.com xcal.tv xfinityhome.com deap.tv masergy.com nnracing.com ident.com oldtownhome.com

Customer-delegated space

how is this classified?
Unclassified 4,332 (99.2%)
Customer access pools 58 (1.3%)

Corporate group (4 confirmed entities)

+47 additional unconfirmed candidates not shown — full list (JSON)

Network trust

what's this?
RPKI hygiene: A how networks compare →
97.0% of checked blocks have valid RPKI ROA coverage (1,940 of 2,000, sampled from 4,390)
No discrepancies found among checked blocks.

NIC Handles

ABOVENET-MNT AS13367 AS14042 AS20214 AS21508 AS22258 AS22909 AS3257-IPAM-MNT AS33287 AS33489 AS33490 AS33491 +88 more