206208 looking glass

AS21508 Comcast Cable Communications, LLC 🇺🇸 US

Announcing 77 prefixes, seen at the RIS collectors.

IPv4 prefixes
16
70,144 (274 × /24)
IPv6 prefixes
61
61 × /48
Upstreams
1
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
50
transit customers observed
Customer cone
20,011
ASes reachable through it

Registry and operator data

AS number
AS21508
Name
Comcast Cable Communications, LLC
Organisation
Comcast - Richmond
Country
🇺🇸 US
RIR
ARIN
Allocated
2001-05-16
Network type
Cable/DSL/ISP
Scope
Regional
Peering policy
Restrictive
PeeringDB
net/10095
Facilities
1

RPKI coverage of this AS

Its own announcements, validated against the current ROA set

71 valid (92.2%) 0 invalid (0.0%) 6 no ROA (7.8%)

Announced prefixes

77 in total

Prefix RPKI Peers Sample path First seen
50.204.101.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.205.217.0/24 v4 RPKI valid 40 7018792221508 2026-09-18
50.216.229.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.217.1.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.217.207.0/24 v4 RPKI valid 41 7018792221508 2026-09-18
50.218.47.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.228.113.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.229.113.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.229.114.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
50.235.34.0/24 v4 RPKI valid 42 7018792221508 2026-09-18
141.104.0.0/16 v4 no ROA 42 7018792221508 2026-09-18
157.240.148.0/24 v4 no ROA 42 7018792221508 2026-09-18
173.242.174.0/24 v4 no ROA 42 7018792221508 2026-09-18
198.90.112.0/22 v4 no ROA 42 7018792221508 2026-09-18
204.194.47.0/24 v4 no ROA 42 7018792221508 2026-09-18
205.223.19.0/24 v4 no ROA 42 7018792221508 2026-09-18
2001:559:8a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c0::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:f7::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:220::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:243::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:280::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:37d::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:3ac::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:3b9::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:3c8::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:40a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:49a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:49b::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:53c::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:5c9::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:5db::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:72b::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:73c::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:788::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:78a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:79d::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:79e::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:7a7::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:7db::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:804c::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:81bf::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:81d7::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:81d8::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8201::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:82fd::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:833e::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8416::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:841c::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8445::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8535::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:85c1::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:85ff::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8604::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:871a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:875f::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:8773::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:87b2::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c071::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c0f6::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c0f7::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c10a::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c174::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c1a5::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c1ca::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c28f::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c290::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c2a7::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c344::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c3e9::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c458::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c45f::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c460::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c4db::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c4f6::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c515::/48 v6 RPKI valid 33 852792221508 2026-09-18
2001:559:c538::/48 v6 RPKI valid 33 852792221508 2026-09-18