Autonomous System

AS600

OARnet

OARnet United States 🌐 osc.edu

Announced IPs

887,296

CIDR prefixes

203

ASN

AS600

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.

57/100

Caution

How this score is built

Baseline (neutral) 65
Active-threat / abuse risk −12
Enterprise allocation +4
Trust score 57 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 16 MOAS prefixes — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS600 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.

Prefix	Origin ASNs	Last detected (UTC)
192.148.241.0/24	AS600, AS3112	2026-10-29 16:21:56
208.108.70.0/24	AS600, AS3112	2026-10-29 16:21:56
140.141.0.0/17	AS600, AS3112	2026-10-29 16:21:56
208.108.128.0/21	AS600, AS3112	2026-10-29 16:21:56
208.108.71.0/24	AS600, AS3112	2026-10-29 16:21:56
192.153.32.0/21	AS600, AS3112	2026-10-29 16:21:56
208.108.11.0/24	AS600, AS3112	2026-10-29 16:21:56
64.254.64.0/20	AS600, AS3112	2026-10-29 16:21:56
208.108.168.0/21	AS600, AS3112	2026-10-29 16:21:56
208.108.184.0/21	AS600, AS3112	2026-10-29 16:21:56
208.108.176.0/21	AS600, AS3112	2026-10-29 16:21:56
208.108.79.0/24	AS600, AS3112	2026-10-29 16:21:56
199.18.241.0/24	AS600, AS3112	2026-10-29 16:21:56
208.108.244.0/22	AS600, AS3112	2026-10-29 16:21:56
199.18.141.0/24	AS600, AS3112	2026-10-29 16:21:56

Showing the 15 most recently detected of 16 MOAS prefixes. Many multi-origin prefixes on large networks are benign (anycast); see all MOAS anomalies.

Network profile

Source: PeeringDB →

Network type Educational/Research

Traffic level 100-200Gbps

Geographic scope Regional

Traffic ratio Mostly Inbound

Peering policy Restrictive

IRR record RADB::AS600:AS-CONE

Present at 2 internet exchanges: Equinix Chicago, Equinix Ashburn

Website ↗

AS600 — global IP footprint

Cities where AS600 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
140.220.0.0/16	65.5K	0.0%	OARnet	US	—	—
144.50.0.0/16	65.5K	0.1%	OARnet	US	Ohio	Xenia
157.134.0.0/16	65.5K	0.0%	OARnet	US	—	—
163.11.0.0/16	65.5K	0.1%	OARnet	US	Ohio	Cedarville
206.244.0.0/16	65.5K	8.0%	OARnet	US	Ohio	North Canton
130.108.128.0/17	32.8K	3.1%	OARnet	US	Ohio	Dayton
131.187.0.0/17	32.8K	10.2%	OARnet	US	Ohio	Columbus
140.141.0.0/17	32.8K	15.1%	OARnet	US	Ohio	Granville
157.134.0.0/17	32.8K	0.0%	OARnet	US	—	—
199.18.128.0/17	32.8K	7.8%	OARnet	US	Ohio	Dover
199.218.0.0/17	32.8K	15.3%	OARnet	US	Ohio	Columbus
130.108.0.0/18	16.4K	7.9%	OARnet	US	Ohio	Fairborn
136.227.0.0/18	16.4K	98.4%	OARnet	US	Ohio	Springfield
146.85.0.0/18	16.4K	0.5%	OARnet	US	—	—
157.134.128.0/18	16.4K	0.2%	OARnet	US	—	—
199.18.0.0/18	16.4K	2.2%	OARnet	US	Ohio	Mansfield
199.218.128.0/18	16.4K	0.0%	OARnet	US	Ohio	Columbus
205.133.0.0/18	16.4K	1.6%	OARnet	US	Ohio	Gambier
205.133.192.0/18	16.4K	0.9%	OARnet	US	Ohio	Wooster
206.21.192.0/18	16.4K	0.6%	OARnet	US	Ohio	Mount Vernon
206.244.0.0/18	16.4K	2.8%	OARnet	US	Ohio	North Canton
206.244.192.0/18	16.4K	21.9%	OARnet	US	—	—
208.108.0.0/18	16.4K	0.7%	OARnet	US	Kentucky	Fort Mitchell
131.187.160.0/19	8.2K	1.0%	OARnet	US	Ohio	Delaware
131.187.192.0/19	8.2K	0.4%	OARnet	US	—	—
143.246.0.0/19	8.2K	29.1%	OARnet	US	Ohio	Norwich
146.85.160.0/19	8.2K	0.3%	OARnet	US	—	—
146.85.224.0/19	8.2K	0.0%	OARnet	US	Ohio	Portsmouth
157.134.192.0/19	8.2K	0.1%	OARnet	US	—	—
198.30.0.0/19	8.2K	10.2%	OARnet	US	Ohio	Sylvania
198.30.96.0/19	8.2K	8.8%	OARnet	US	Ohio	Columbus
199.18.96.0/19	8.2K	8.8%	OARnet	US	Ohio	Oberlin
199.18.160.0/19	8.2K	11.3%	OARnet	US	Ohio	Mansfield
199.218.192.0/19	8.2K	0.9%	OARnet	US	Ohio	Delaware
205.133.96.0/19	8.2K	1.5%	OARnet	US	Ohio	Hilliard
205.133.224.0/19	8.2K	1.4%	OARnet	US	Ohio	Marietta
206.21.32.0/19	8.2K	8.0%	OARnet	US	Ohio	South Point
206.21.64.0/19	8.2K	0.3%	OARnet	US	Ohio	Columbus
206.21.128.0/19	8.2K	0.0%	OARnet	US	Ohio	Delaware
206.244.64.0/19	8.2K	7.3%	OARnet	US	Ohio	Steubenville
64.254.64.0/20	4.1K	1.0%	OARnet	US	Ohio	Warren
130.108.80.0/20	4.1K	0.0%	OARnet	US	—	—
131.187.144.0/20	4.1K	0.0%	OARnet	US	Ohio	Delaware
140.228.0.0/20	4.1K	98.6%	OARnet	US	Ohio	Ada
157.134.224.0/20	4.1K	0.0%	OARnet	US	—	—
192.232.16.0/20	4.1K	20.8%	OARnet	US	Ohio	Elyria
198.30.16.0/20	4.1K	6.9%	OARnet	US	Ohio	North Ridgeville
198.30.32.0/20	4.1K	15.4%	OARnet	US	Ohio	Dayton
198.30.64.0/20	4.1K	50.1%	OARnet	US	Ohio	Columbus
198.30.144.0/20	4.1K	8.4%	OARnet	US	—	—
198.30.208.0/20	4.1K	19.2%	OARnet	US	Ohio	Columbus
198.30.240.0/20	4.1K	0.9%	OARnet	US	Ohio	Columbus
199.18.16.0/20	4.1K	2.1%	OARnet	US	—	—
199.18.144.0/20	4.1K	16.1%	OARnet	US	Ohio	Rootstown
199.218.224.0/20	4.1K	19.7%	OARnet	US	Ohio	Columbus
205.133.80.0/20	4.1K	0.9%	OARnet	US	—	—
205.133.128.0/20	4.1K	0.1%	OARnet	US	Ohio	Marietta
205.133.192.0/20	4.1K	0.0%	OARnet	US	Ohio	Wooster
206.21.16.0/20	4.1K	31.6%	OARnet	US	Ohio	Mansfield
206.21.112.0/20	4.1K	0.1%	OARnet	US	Ohio	Delaware
206.21.176.0/20	4.1K	0.5%	OARnet	US	—	—
206.244.96.0/20	4.1K	12.5%	OARnet	US	Ohio	Steubenville
206.244.144.0/20	4.1K	0.2%	OARnet	US	Ohio	Berea
206.244.176.0/20	4.1K	0.8%	OARnet	US	—	—
208.108.64.0/20	4.1K	0.0%	OARnet	US	—	—
208.108.176.0/20	4.1K	0.0%	OARnet	US	Ohio	Akron
208.108.240.0/20	4.1K	3.1%	OARnet	US	—	—
130.108.64.0/21	2.0K	1.6%	OARnet	US	—	—
130.108.96.0/21	2.0K	8.9%	OARnet	US	—	—
130.108.112.0/21	2.0K	1.0%	OARnet	US	—	—
131.187.136.0/21	2.0K	34.4%	OARnet	US	—	—
131.187.232.0/21	2.0K	4.4%	OARnet	US	Ohio	Xenia
131.187.240.0/21	2.0K	0.0%	OARnet	US	—	—
136.227.128.0/21	2.0K	98.7%	OARnet	US	—	—
157.134.248.0/21	2.0K	0.0%	OARnet	US	—	—
198.30.0.0/21	2.0K	14.2%	OARnet	US	—	—
198.30.48.0/21	2.0K	4.3%	OARnet	US	Ohio	Kenton
198.30.88.0/21	2.0K	3.9%	OARnet	US	—	—
198.30.136.0/21	2.0K	1.6%	OARnet	US	—	—
198.30.144.0/21	2.0K	0.3%	OARnet	US	—	—
198.30.168.0/21	2.0K	0.2%	OARnet	US	—	—
198.30.184.0/21	2.0K	16.4%	OARnet	US	—	—
198.30.192.0/21	2.0K	2.9%	OARnet	US	—	—
198.30.232.0/21	2.0K	0.4%	OARnet	US	—	—
199.18.0.0/21	2.0K	3.7%	OARnet	US	—	—
199.18.72.0/21	2.0K	9.9%	OARnet	US	—	—
199.18.128.0/21	2.0K	4.8%	OARnet	US	—	—
199.18.192.0/21	2.0K	4.2%	OARnet	US	Ohio	Columbus
199.18.216.0/21	2.0K	7.5%	OARnet	US	—	—
199.18.224.0/21	2.0K	5.4%	OARnet	US	—	—
199.18.248.0/21	2.0K	0.2%	OARnet	US	—	—
199.218.240.0/21	2.0K	9.3%	OARnet	US	—	—
204.57.8.0/21	2.0K	1.7%	OARnet	US	Ohio	Cincinnati
205.133.64.0/21	2.0K	7.9%	OARnet	US	—	—
205.133.144.0/21	2.0K	0.2%	OARnet	US	—	—
205.133.184.0/21	2.0K	0.0%	OARnet	US	Ohio	Hilliard
205.133.208.0/21	2.0K	1.7%	OARnet	US	Ohio	Bluffton
206.21.0.0/21	2.0K	13.5%	OARnet	US	—	—
206.21.32.0/21	2.0K	0.0%	OARnet	US	—	—
206.21.96.0/21	2.0K	12.3%	OARnet	US	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS600 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
199.218.126.0/23	414,561	2026-10-29 15:26:34
199.218.112.0/24	413,982	2026-10-29 15:26:34
199.218.111.0/24	413,741	2026-10-29 15:26:34
199.120.181.0/24	79,042	2026-10-29 15:26:34
64.254.64.0/20	56,994	2026-10-29 15:26:34
208.108.44.0/24	36,666	2026-10-29 15:26:34
208.108.50.0/24	33,146	2026-10-29 15:26:34
208.108.176.0/21	32,630	2026-10-29 15:26:34
192.88.193.0/24	31,083	2026-10-29 15:26:35
206.21.106.0/24	30,651	2026-10-29 15:26:34
163.11.0.0/16	29,317	2026-10-29 15:26:34
192.131.123.0/24	29,179	2026-10-29 15:26:34
140.228.0.0/20	25,767	2026-10-29 15:26:34
208.108.54.0/24	25,702	2026-10-29 15:26:34
205.133.85.0/24	25,225	2026-10-29 14:19:14
208.108.52.0/24	24,989	2026-10-29 15:26:34
192.88.195.0/24	24,291	2026-10-29 15:26:34
140.141.0.0/17	23,710	2026-10-29 15:26:34
192.148.248.0/22	22,830	2026-10-29 15:26:35
192.148.240.0/21	22,705	2026-10-29 15:26:35
192.153.26.0/23	22,626	2026-10-29 15:26:35
208.108.244.0/22	22,591	2026-10-29 15:26:35
192.148.235.0/24	22,572	2026-10-29 15:26:35
208.108.79.0/24	22,542	2026-10-29 15:26:35
208.108.71.0/24	22,487	2026-10-29 15:26:35
208.108.5.0/24	22,486	2026-10-29 15:26:35
146.85.32.0/19	22,485	2026-10-29 15:26:34
146.85.0.0/19	22,456	2026-10-29 15:26:34
192.148.236.0/22	22,431	2026-10-29 15:26:35
146.85.224.0/19	22,375	2026-10-29 15:26:34
192.232.19.0/24	22,364	2026-10-29 15:26:36
192.148.237.0/24	22,336	2026-10-29 15:26:36
146.85.160.0/19	22,300	2026-10-29 15:26:34
199.218.0.0/16	22,213	2026-10-29 15:26:35
204.128.217.0/24	22,181	2026-10-29 15:26:34
192.153.40.0/23	22,173	2026-10-29 15:26:35
206.21.0.0/16	22,145	2026-10-29 15:26:35
192.153.32.0/24	22,144	2026-10-29 15:26:34
208.108.11.0/24	22,124	2026-10-29 15:26:34
206.244.0.0/16	22,122	2026-10-29 15:26:35
192.88.192.0/22	22,120	2026-10-29 15:26:35
199.18.0.0/16	22,084	2026-10-29 15:26:35
192.232.16.0/20	22,065	2026-10-29 15:26:35
198.30.0.0/16	22,053	2026-10-29 15:26:35
131.238.28.0/24	22,045	2026-10-29 15:26:34
192.153.32.0/21	22,016	2026-10-29 15:26:35
205.133.0.0/16	21,988	2026-10-29 15:26:35
131.187.0.0/16	21,863	2026-10-29 15:26:35
208.108.70.0/24	21,806	2026-10-29 15:26:34
157.134.0.0/16	21,783	2026-10-29 15:26:35

Showing top 50 of 87 announced prefixes by sample volume.

Frequently Asked Questions

What is AS600?

AS600 is an Autonomous System Number assigned to OARnet. 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 AS600 announce?

AS600 announces 887.3K IPv4 addresses distributed across 203 routed CIDR prefixes. The network is registered in United States.

Who operates AS600?

AS600 is operated by OARnet. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS600 registered in?

AS600 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: 2026-10-29 16:09:06 UTC