ASN AS19231 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS19231?

AS19231 is listed under NBCUniversal.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS19231 NBCUniversal | IPGeolocation.io

ASN Lookup Tool

NBCUniversal nbcuni.com

US 5 Routes

AS Data

AS19231

AS19231 – NBCUniversal

AS Number	19231
AS Name	NBCUNI
Organization	NBCUniversal(nbcun-5)
Country	US
Website	nbcuni.com
Number of IPv4 Routes	5
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-12-13

ASN Intelligence API for production workflows

Use ASN data for AS19231 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
50.203.232.0/24	AS19231	NBCUniversal	Comcast Cable Communications, LLC	256
208.73.112.0/24	AS19231	NBCUniversal	NBCUniversal	256
208.73.115.0/24	AS19231	NBCUniversal	NBCUniversal	256
208.73.114.0/24	AS19231	NBCUniversal	NBCUniversal	256
173.213.210.0/24	AS19231	NBCUniversal	NBCUniversal	256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       19231
ASName:         NBCUNI
ASHandle:       AS19231
RegDate:        2006-12-13
Updated:        2020-07-10    
Ref:            https://rdap.arin.net/registry/autnum/19231


OrgName:        NBCUniversal
OrgId:          NBCUN-5
Address:        30 ROCKEFELLER CENTER
City:           NEW YORK
StateProv:      NY
PostalCode:     10112
Country:        US
RegDate:        2006-12-11
Updated:        2025-01-21
Ref:            https://rdap.arin.net/registry/entity/NBCUN-5


OrgAbuseHandle: INFOS6-ARIN
OrgAbuseName:   InfoSec
OrgAbusePhone:  +1-212-664-4444 
OrgAbuseEmail:  sralerts@nbcuni.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/INFOS6-ARIN

OrgTechHandle: NBCUT-ARIN
OrgTechName:   NBCU Technical
OrgTechPhone:  +1-818-777-9673 
OrgTechEmail:  nbcu_arintech@nbcuni.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NBCUT-ARIN

OrgNOCHandle: NBCUO-ARIN
OrgNOCName:   NBCUO-ARIN
OrgNOCPhone:  +1-818-777-9673 
OrgNOCEmail:  nbcu_arinops@nbcuni.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NBCUO-ARIN

RAbuseHandle: NBCUA-ARIN
RAbuseName:   NBCU Admin
RAbusePhone:  +1-818-777-9673 
RAbuseEmail:  nbcu_arin@nbcuni.com
RAbuseRef:    https://rdap.arin.net/registry/entity/NBCUA-ARIN

RNOCHandle: NBCUA-ARIN
RNOCName:   NBCU Admin
RNOCPhone:  +1-818-777-9673 
RNOCEmail:  nbcu_arin@nbcuni.com
RNOCRef:    https://rdap.arin.net/registry/entity/NBCUA-ARIN

RTechHandle: NBCUT-ARIN
RTechName:   NBCU Technical
RTechPhone:  +1-818-777-9673 
RTechEmail:  nbcu_arintech@nbcuni.com
RTechRef:    https://rdap.arin.net/registry/entity/NBCUT-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS7922	Comcast Cable Communications, LLC	US

Upstreams

AS Number	Description	Country
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS7922	Comcast Cable Communications, LLC	US