ASN AS81 is an Autonomous System Number used to identify a network for BGP internet routing.

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.

AS81 MCNC | IPGeolocation.io

ASN Lookup Tool

MCNC mcnc.org

US 144 Routes

AS Data

AS81

AS81 – MCNC

AS Number	81
AS Name	NCREN
Organization	MCNC(mcnc-z)
Country	US
Website	mcnc.org
Number of IPv4 Routes	141
Number of IPv6 Routes	3
ASN type	ISP
Registry	ARIN
Date Allocated	1986-08-07

ASN Intelligence API for production workflows

Use ASN data for AS81 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
152.45.10.0/24	AS81	MCNC	MCNC	256
152.22.80.0/21	AS81	MCNC	MCNC	2048
152.46.37.0/24	AS81	MCNC	MCNC	256
152.10.0.0/16	AS81	MCNC	Appalachian State University	65536
192.154.60.0/24	AS81	MCNC	Lenoir Rhyne University	256
152.46.28.0/24	AS81	MCNC	MCNC	256
152.46.2.0/24	AS81	MCNC	MCNC	256
152.45.4.0/24	AS81	MCNC	MCNC	256
152.26.0.0/16	AS81	MCNC	MCNC	65536
152.29.0.0/16	AS81	MCNC	MCNC	65536

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:       81
ASName:         NCREN
ASHandle:       AS81
RegDate:        1986-08-07
Updated:        2021-06-29    
Ref:            https://rdap.arin.net/registry/autnum/81


OrgName:        MCNC
OrgId:          MCNC-Z
Address:        3021 E. Cornwallis Rd
City:           Durham
StateProv:      NC
PostalCode:     27713-2852
Country:        US
RegDate:        2021-06-14
Updated:        2026-02-12
Ref:            https://rdap.arin.net/registry/entity/MCNC-Z


OrgAbuseHandle: ABUSE3348-ARIN
OrgAbuseName:   Abuse Contact
OrgAbusePhone:  +1-919-248-4111 
OrgAbuseEmail:  abuse@mcnc.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE3348-ARIN

OrgTechHandle: NCREN-ARIN
OrgTechName:   NCREN Hostmaster
OrgTechPhone:  +1-919-248-4111 
OrgTechEmail:  hostmaster@ncren.net
OrgTechRef:    https://rdap.arin.net/registry/entity/NCREN-ARIN

RTechHandle: NH34-ORG-ARIN
RTechName:   NCREN Hostmaster
RTechPhone:  +1-919-248-4111 
RTechEmail:  hostmaster@ncren.net
RTechRef:    https://rdap.arin.net/registry/entity/NH34-ORG-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
AS395465	Apogee Telecom Inc.	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS399407	Salem Academy and College	US
AS396978	Orange Water and Sewer Authority	US
AS46255	Charlotte-Mecklenburg Schools	US
AS19413	Roanoke Connect	US
AS19718	MCNC	US
AS46963	City of Winston Salem	US
AS47098	Sampson County Schools	US
AS395312	RESERVED	ZZ

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS11537	Internet2	US
AS11426	Charter Communications Inc	US
AS11164	Internet2	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US

Downstreams

AS Number	Description	Country
AS395465	Apogee Telecom Inc.	US
AS46255	Charlotte Mecklenburg Schools	US
AS10952	East Carolina University	US
AS399407	Salem Academy and College	US
AS400959	Town of Cary	US
AS396978	Orange Water and Sewer Authority	US
AS20197	Castle & Cooke North Carolina, LLC	US
AS6559	State of NC State Telecommunications Services	US
AS19413	Roanoke Connect	US
AS19718	MCNC	US