AS19231 — NBCUNI

AS19231 announces 4 IPv4 prefixes covering 1,280 addresses and 0 IPv6 prefixes.

About this network

NBCUNI is operated by NBCUniversal.

What it's used for

• The address space carries corporate infrastructure for the media company, evidenced by netnames NBCUNI and NBC-UNIVERSAL registered to NBCUniversal; NBCU Technical.
• The AS announces 1280 IPv4 addresses across 4 prefixes with only 3 observed neighbours, indicating a small internal corporate estate rather than a transit or access network.

Notable

• Registrants largely align with the announcer, with NBCUniversal; NBCU Technical listed for three of the four prefixes.
• One prefix, 50.203.232.0/24, is registered to Comcast Cable Communications, LLC with netname CCCH3-4, reflecting the corporate relationship between NBCUniversal and its parent company Comcast.
• The inventory consists of four distinct IPv4 blocks, including a /23 and three /24s, with no IPv6 prefixes announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 50.203.232.0/24
• 173.213.210.0/24
• 208.73.112.0/24
• 208.73.114.0/23

Upstream networks

• AS7922 Comcast Cable Communications, LLC
• AS3257 GTT Communications Inc.

Adjacent networks

• AS7922 Comcast Cable Communications, LLC
• AS3257 GTT Communications Inc.

Routing security

• RPKI: 1 valid, 0 invalid and 4 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 0% of announcements registered; 1 route objects.
• Listed in as-sets: AS-COMCAST-IBONE, AS-GTTCUST.