Autonomous System

AS81

MCNC

MCNC United States 🌐 mcnc.org

Announced IPs

2,056,192

CIDR prefixes

124

ASN

AS81

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

69/100

Moderate

How this score is built

Baseline (neutral) 65
Enterprise allocation +4
Trust score 69 / 100

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

About Microelectronics Center of North Carolina

Company in Durham, United States.

Founded

1980

Headquarters

Durham

Official website ↗ Data from Wikidata

Network profile

Source: PeeringDB →

Network type Educational/Research

Geographic scope Regional

Traffic ratio Balanced

Peering policy Open

IRR record ARIN::AS-NCREN

Website ↗

AS81 — global IP footprint

Cities where AS81 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.

View on 3D globe →

Top CIDR ranges

CIDR	IPs	PTR Density	Organization	Country	State	City
152.8.0.0/14	262.1K	8.4%	MCNC	US	North Carolina	Durham
152.20.0.0/15	131.1K	0.4%	MCNC	US	North Carolina	Laurinburg
152.28.0.0/15	131.1K	0.0%	MCNC	US	North Carolina	Rockingham
152.46.0.0/15	131.1K	1.7%	MCNC	US	—	—
152.48.0.0/15	131.1K	0.0%	MCNC	US	—	—
128.109.0.0/16	65.5K	7.2%	MCNC	US	North Carolina	Benson
152.4.0.0/16	65.5K	1.2%	MCNC	US	North Carolina	Morrisville
152.6.0.0/16	65.5K	5.3%	MCNC	US	North Carolina	Fayetteville
152.12.0.0/16	65.5K	0.1%	MCNC	US	North Carolina	Winston-Salem
152.18.0.0/16	65.5K	53.8%	MCNC	US	North Carolina	Asheville
152.27.0.0/16	65.5K	0.9%	MCNC	US	North Carolina	Clayton
152.30.0.0/16	65.5K	0.3%	MCNC	US	North Carolina	Cullowhee
152.35.0.0/16	65.5K	0.0%	MCNC	US	North Carolina	Raleigh
152.45.0.0/16	65.5K	1.4%	MCNC	US	—	—
152.54.0.0/16	65.5K	1.7%	MCNC	US	—	—
152.60.0.0/16	65.5K	0.0%	MCNC	US	—	—
152.26.128.0/17	32.8K	1.0%	MCNC	US	North Carolina	Wake Forest
152.27.128.0/17	32.8K	0.0%	MCNC	US	—	—
152.40.128.0/17	32.8K	0.0%	MCNC	US	—	—
152.55.0.0/17	32.8K	0.0%	MCNC	US	New York	Warsaw
198.86.128.0/17	32.8K	3.7%	MCNC	US	North Carolina	Raleigh
204.85.0.0/17	32.8K	1.0%	MCNC	US	North Carolina	Rocky Mount
152.22.64.0/18	16.4K	2.0%	MCNC	US	North Carolina	Charlotte
152.22.128.0/18	16.4K	0.0%	MCNC	US	—	—
152.27.0.0/18	16.4K	3.2%	MCNC	US	North Carolina	Clayton
152.32.0.0/18	16.4K	0.1%	MCNC	US	—	—
152.38.0.0/18	16.4K	0.5%	MCNC	US	North Carolina	Smithfield
152.38.192.0/18	16.4K	0.0%	MCNC	US	North Carolina	Spring Lake
152.40.64.0/18	16.4K	0.0%	MCNC	US	—	—
152.42.64.0/18	16.4K	0.0%	MCNC	US	North Carolina	Davidson
198.85.0.0/18	16.4K	0.4%	MCNC	US	North Carolina	Elizabeth City
198.85.128.0/18	16.4K	1.1%	MCNC	US	North Carolina	Winston-Salem
198.86.64.0/18	16.4K	1.4%	MCNC	US	North Carolina	Chapel Hill
204.84.128.0/18	16.4K	0.2%	MCNC	US	North Carolina	Taylorsville
204.85.192.0/18	16.4K	0.3%	MCNC	US	North Carolina	Apex
152.22.32.0/19	8.2K	2.1%	MCNC	US	North Carolina	Raleigh
152.22.192.0/19	8.2K	0.0%	MCNC	US	—	—
152.26.96.0/19	8.2K	0.0%	MCNC	US	—	—
152.27.96.0/19	8.2K	0.0%	MCNC	US	North Carolina	Clayton
152.38.64.0/19	8.2K	0.0%	MCNC	US	North Carolina	Apex
152.38.160.0/19	8.2K	0.0%	MCNC	US	North Carolina	Lillington
198.85.64.0/19	8.2K	0.3%	MCNC	US	North Carolina	Aberdeen
198.86.32.0/19	8.2K	1.3%	MCNC	US	North Carolina	Charlotte
204.84.32.0/19	8.2K	0.5%	MCNC	US	North Carolina	Midland
204.84.96.0/19	8.2K	0.3%	MCNC	US	North Carolina	Jefferson
204.84.192.0/19	8.2K	0.1%	MCNC	US	North Carolina	Durham
204.85.128.0/19	8.2K	0.0%	MCNC	US	North Carolina	Charlotte
206.211.64.0/19	8.2K	0.0%	MCNC	US	North Carolina	Durham
152.22.16.0/20	4.1K	0.0%	MCNC	US	—	—
152.26.0.0/20	4.1K	7.3%	MCNC	US	North Carolina	Windsor
152.26.32.0/20	4.1K	4.1%	MCNC	US	North Carolina	Whiteville
152.26.64.0/20	4.1K	4.2%	MCNC	US	North Carolina	Mooresville
152.27.80.0/20	4.1K	0.0%	MCNC	US	North Carolina	Clayton
198.85.96.0/20	4.1K	0.1%	MCNC	US	North Carolina	Aberdeen
198.85.192.0/20	4.1K	0.5%	MCNC	US	North Carolina	Fayetteville
198.85.240.0/20	4.1K	0.1%	MCNC	US	North Carolina	Louisburg
198.86.0.0/20	4.1K	0.4%	MCNC	US	North Carolina	Lillington
204.84.16.0/20	4.1K	4.2%	MCNC	US	North Carolina	Hendersonville
204.84.80.0/20	4.1K	0.8%	MCNC	US	North Carolina	Raleigh
204.85.160.0/20	4.1K	0.0%	MCNC	US	—	—
152.22.8.0/21	2.0K	0.0%	MCNC	US	—	—
152.26.16.0/21	2.0K	4.5%	MCNC	US	North Carolina	Ayden
152.26.56.0/21	2.0K	0.0%	MCNC	US	North Carolina	Gastonia
152.26.80.0/21	2.0K	0.5%	MCNC	US	—	—
152.27.64.0/21	2.0K	1.6%	MCNC	US	North Carolina	Asheville
198.85.120.0/21	2.0K	0.0%	MCNC	US	—	—
198.85.232.0/21	2.0K	1.1%	MCNC	US	—	—
198.86.16.0/21	2.0K	2.1%	MCNC	US	—	—
204.84.0.0/21	2.0K	0.0%	MCNC	US	South Carolina	Clemson
204.84.72.0/21	2.0K	0.0%	MCNC	US	—	—
204.84.224.0/21	2.0K	21.1%	MCNC	US	North Carolina	Forest City
152.22.4.0/22	1.0K	0.0%	MCNC	US	—	—
152.26.24.0/22	1.0K	0.1%	MCNC	US	North Carolina	Greensboro
152.26.48.0/22	1.0K	2.7%	MCNC	US	North Carolina	Wilmington
152.26.60.0/22	1.0K	4.5%	MCNC	US	North Carolina	Gastonia
152.26.92.0/22	1.0K	0.0%	MCNC	US	—	—
152.27.76.0/22	1.0K	0.0%	MCNC	US	—	—
152.55.188.0/22	1.0K	0.0%	MCNC	US	—	—
198.85.112.0/22	1.0K	0.5%	MCNC	US	—	—
198.85.208.0/22	1.0K	1.7%	MCNC	US	North Carolina	Fayetteville
198.85.216.0/22	1.0K	1.6%	MCNC	US	North Carolina	Hickory
198.85.224.0/22	1.0K	4.4%	MCNC	US	—	—
198.86.24.0/22	1.0K	0.6%	MCNC	US	—	—
204.84.0.0/22	1.0K	0.4%	MCNC	US	South Carolina	Clemson
204.84.12.0/22	1.0K	0.0%	MCNC	US	—	—
204.84.68.0/22	1.0K	0.0%	MCNC	US	—	—
204.84.232.0/22	1.0K	2.8%	MCNC	US	North Carolina	Hickory
204.84.240.0/22	1.0K	22.8%	MCNC	US	—	—
204.84.248.0/22	1.0K	0.0%	MCNC	US	—	—
152.22.2.0/23	512	0.0%	MCNC	US	—	—
152.26.28.0/23	512	5.9%	MCNC	US	North Carolina	Rose Hill
152.26.52.0/23	512	3.5%	MCNC	US	North Carolina	Hendersonville
152.26.58.0/23	512	3.9%	MCNC	US	—	—
152.27.72.0/23	512	1.6%	MCNC	US	—	—
192.101.22.0/23	512	2.1%	MCNC	US	—	—
192.154.60.0/23	512	0.0%	MCNC	US	—	—
192.154.76.0/23	512	0.0%	MCNC	US	—	—
198.85.118.0/23	512	0.6%	MCNC	US	—	—
198.85.214.0/23	512	1.4%	MCNC	US	North Carolina	Edenton
198.86.30.0/23	512	0.0%	MCNC	US	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS81 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

Prefix	Announcement samples	Last seen
152.28.0.0/16	40,650	2026-09-08 12:43:49
152.12.0.0/16	31,570	2026-09-08 12:43:49
152.60.4.0/24	27,916	2026-09-08 12:43:48
152.22.64.0/21	26,184	2026-09-08 12:43:46
152.21.0.0/16	25,975	2026-09-08 12:25:25
152.18.0.0/16	24,293	2026-09-08 12:25:25
152.29.0.0/16	23,504	2026-09-08 12:25:25
204.84.80.0/20	23,357	2026-09-08 12:25:25
152.38.192.0/20	23,183	2026-09-08 11:06:18
152.38.17.0/24	23,101	2026-09-08 11:06:18
152.38.18.0/24	23,073	2026-09-08 11:06:18
152.26.211.0/24	21,648	2026-09-08 11:38:28
152.45.2.0/24	20,620	2026-09-08 11:06:18
152.45.10.0/24	20,616	2026-09-08 11:06:18
152.45.1.0/24	20,605	2026-09-08 11:06:18
152.45.15.0/24	20,596	2026-09-08 11:06:18
152.26.210.0/24	20,031	2026-09-08 11:38:28
152.30.92.0/22	19,935	2026-09-08 10:43:29
152.26.208.0/24	19,928	2026-09-08 12:43:49
152.46.48.0/24	17,637	2026-09-08 11:06:18
152.46.16.0/21	17,618	2026-09-08 11:06:18
152.46.252.0/22	17,573	2026-09-08 11:06:18
152.46.9.0/24	17,469	2026-09-08 11:06:18
152.46.42.0/24	17,457	2026-09-08 11:06:18
152.46.34.0/24	17,444	2026-09-08 11:06:18
152.46.28.0/24	17,443	2026-09-08 11:06:18
152.46.1.0/24	17,443	2026-09-08 11:06:18
152.35.0.0/16	17,336	2026-09-01 13:48:59
204.85.192.0/18	17,253	2026-09-08 11:06:18
152.10.0.0/16	16,858	2026-09-08 11:06:18
152.30.92.0/24	16,626	2026-09-08 10:43:29
152.26.209.0/24	16,506	2026-09-08 11:33:58
152.26.212.0/24	16,479	2026-09-08 10:43:35
152.28.1.0/24	16,393	2026-09-08 12:43:49
152.6.0.0/16	16,093	2026-09-08 12:25:25
152.42.64.0/18	15,339	2026-09-08 10:43:29
152.30.0.0/16	15,235	2026-09-08 11:06:18
152.38.0.0/18	14,508	2026-09-08 11:06:18
152.9.0.0/16	14,403	2026-09-08 12:25:25
198.85.0.0/16	14,182	2026-09-08 11:06:18
204.84.0.0/15	14,178	2026-09-08 11:06:18
152.20.0.0/16	14,092	2026-09-08 11:06:18
198.86.0.0/16	13,718	2026-09-08 11:06:18
198.86.244.0/22	13,619	2026-09-08 10:43:34
152.11.0.0/16	13,482	2026-09-08 11:06:18
152.22.48.0/21	13,251	2026-09-08 10:43:29
152.22.32.0/21	13,144	2026-09-08 10:43:29
152.22.40.0/21	13,131	2026-09-08 10:43:29
152.27.0.0/16	13,072	2026-09-08 11:06:18
152.32.0.0/18	12,939	2026-09-08 11:06:18

Showing top 50 of 145 announced prefixes by sample volume.

Frequently Asked Questions

What is AS81?

AS81 is an Autonomous System Number assigned to MCNC. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS81 announce?

AS81 announces 2.06M IPv4 addresses distributed across 124 routed CIDR prefixes. The network is registered in United States.

Who operates AS81?

AS81 is operated by MCNC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS81 registered in?

AS81 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-09-08 12:39:05 UTC