Autonomous System

AS600

OARnet

OARnet United States 🌐 osc.edu

Announced IPs

912,384

CIDR prefixes

211

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
Multiple-origin (MOAS) routing anomaly −12
Enterprise allocation +4
Trust score 57 / 100

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

⚠ 10 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	2026-07-23 15:53:30
208.108.128.0/21	AS600, AS3112	2026-07-23 15:53:30
208.108.11.0/24	AS600, AS3112	2026-07-23 15:53:30
208.108.184.0/21	AS600, AS3112	2026-07-23 15:53:30
208.108.71.0/24	AS600, AS3112	2026-07-22 23:23:24
208.108.168.0/21	AS600, AS3112	2026-07-22 23:23:24
208.108.244.0/22	AS600, AS3112	2026-07-22 23:23:24
208.108.5.0/24	AS600, AS3112	2026-07-22 23:23:24
64.254.64.0/20	AS600, AS3112	2026-07-22 23:23:24
140.141.0.0/17	AS600, AS3112	2026-07-22 22:53:24

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	Wilberforce
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	0.0%	OARnet	US	Ohio	Steubenville
131.187.0.0/17	32.8K	9.7%	OARnet	US	Ohio	Columbus
140.141.0.0/17	32.8K	13.2%	OARnet	US	Ohio	Granville
143.246.0.0/17	32.8K	7.1%	OARnet	US	Ohio	New Concord
157.134.0.0/17	32.8K	0.0%	OARnet	US	—	—
199.18.128.0/17	32.8K	0.0%	OARnet	US	Ohio	Cincinnati
199.218.0.0/17	32.8K	13.7%	OARnet	US	Ohio	Columbus
130.108.0.0/18	16.4K	5.7%	OARnet	US	Ohio	Celina
130.108.128.0/18	16.4K	4.4%	OARnet	US	Ohio	Dayton
136.227.0.0/18	16.4K	82.6%	OARnet	US	Ohio	Yellow Springs
146.85.0.0/18	16.4K	0.4%	OARnet	US	—	—
157.134.128.0/18	16.4K	0.2%	OARnet	US	—	—
199.18.0.0/18	16.4K	0.0%	OARnet	US	Ohio	Middlefield
199.218.128.0/18	16.4K	0.0%	OARnet	US	Ohio	Columbus
205.133.0.0/18	16.4K	1.4%	OARnet	US	Ohio	Columbus
205.133.192.0/18	16.4K	0.0%	OARnet	US	Ohio	Marietta
206.21.192.0/18	16.4K	0.5%	OARnet	US	Ohio	Delaware
206.244.0.0/18	16.4K	2.3%	OARnet	US	Ohio	North Canton
206.244.192.0/18	16.4K	18.7%	OARnet	US	—	—
208.108.0.0/18	16.4K	0.7%	OARnet	US	Kentucky	Fort Mitchell
130.108.192.0/19	8.2K	0.7%	OARnet	US	Ohio	Fairborn
131.187.160.0/19	8.2K	1.0%	OARnet	US	Ohio	Delaware
131.187.192.0/19	8.2K	0.3%	OARnet	US	—	—
146.85.160.0/19	8.2K	0.1%	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	7.9%	OARnet	US	Ohio	Sylvania
198.30.96.0/19	8.2K	6.8%	OARnet	US	Ohio	Columbus
199.18.96.0/19	8.2K	5.8%	OARnet	US	Ohio	Oberlin
199.18.160.0/19	8.2K	7.1%	OARnet	US	Ohio	Mount Vernon
199.218.192.0/19	8.2K	0.8%	OARnet	US	Ohio	Delaware
205.133.96.0/19	8.2K	1.3%	OARnet	US	Ohio	Columbus
205.133.224.0/19	8.2K	1.2%	OARnet	US	Ohio	Marietta
206.21.32.0/19	8.2K	0.0%	OARnet	US	Ohio	Bidwell
206.21.64.0/19	8.2K	0.2%	OARnet	US	Ohio	Ashley
206.21.128.0/19	8.2K	0.0%	OARnet	US	Ohio	Delaware
206.244.64.0/19	8.2K	0.9%	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	—	—
130.108.224.0/20	4.1K	0.1%	OARnet	US	Ohio	Fairborn
131.187.144.0/20	4.1K	0.0%	OARnet	US	Ohio	Delaware
140.228.0.0/20	4.1K	98.4%	OARnet	US	Ohio	Ada
157.134.224.0/20	4.1K	0.0%	OARnet	US	—	—
192.232.16.0/20	4.1K	13.0%	OARnet	US	Ohio	Elyria
198.30.16.0/20	4.1K	5.4%	OARnet	US	Ohio	Akron
198.30.32.0/20	4.1K	11.6%	OARnet	US	Ohio	Dayton
198.30.64.0/20	4.1K	35.7%	OARnet	US	Ohio	Columbus
198.30.144.0/20	4.1K	6.4%	OARnet	US	—	—
198.30.208.0/20	4.1K	15.2%	OARnet	US	Ohio	Columbus
198.30.240.0/20	4.1K	0.7%	OARnet	US	Ohio	Columbus
199.18.16.0/20	4.1K	1.2%	OARnet	US	—	—
199.18.144.0/20	4.1K	10.3%	OARnet	US	Ohio	Rootstown
199.218.224.0/20	4.1K	16.4%	OARnet	US	Ohio	Middletown
205.133.80.0/20	4.1K	0.8%	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	Columbus
206.21.16.0/20	4.1K	30.4%	OARnet	US	Ohio	Galion
206.21.112.0/20	4.1K	0.1%	OARnet	US	Ohio	Delaware
206.21.176.0/20	4.1K	0.4%	OARnet	US	—	—
206.244.96.0/20	4.1K	0.2%	OARnet	US	Ohio	Steubenville
206.244.144.0/20	4.1K	0.1%	OARnet	US	Ohio	Columbia Station
206.244.176.0/20	4.1K	0.7%	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	2.9%	OARnet	US	—	—
130.108.64.0/21	2.0K	1.7%	OARnet	US	—	—
130.108.96.0/21	2.0K	7.5%	OARnet	US	—	—
130.108.112.0/21	2.0K	0.9%	OARnet	US	—	—
130.108.240.0/21	2.0K	0.0%	OARnet	US	—	—
131.187.136.0/21	2.0K	33.5%	OARnet	US	—	—
131.187.232.0/21	2.0K	0.0%	OARnet	US	Ohio	Xenia
131.187.240.0/21	2.0K	0.0%	OARnet	US	—	—
136.227.128.0/21	2.0K	86.6%	OARnet	US	—	—
157.134.248.0/21	2.0K	0.0%	OARnet	US	—	—
198.30.0.0/21	2.0K	10.8%	OARnet	US	—	—
198.30.48.0/21	2.0K	3.5%	OARnet	US	Ohio	Kenton
198.30.88.0/21	2.0K	0.0%	OARnet	US	—	—
198.30.136.0/21	2.0K	1.3%	OARnet	US	—	—
198.30.144.0/21	2.0K	0.2%	OARnet	US	—	—
198.30.168.0/21	2.0K	0.2%	OARnet	US	—	—
198.30.184.0/21	2.0K	0.0%	OARnet	US	—	—
198.30.192.0/21	2.0K	0.0%	OARnet	US	—	—
198.30.232.0/21	2.0K	0.0%	OARnet	US	Ohio	Westerville
199.18.0.0/21	2.0K	2.1%	OARnet	US	—	—
199.18.72.0/21	2.0K	6.2%	OARnet	US	Ohio	South Vienna
199.18.128.0/21	2.0K	3.4%	OARnet	US	—	—
199.18.192.0/21	2.0K	2.1%	OARnet	US	Ohio	Columbus
199.18.216.0/21	2.0K	5.2%	OARnet	US	—	—
199.18.224.0/21	2.0K	3.5%	OARnet	US	—	—
199.18.248.0/21	2.0K	0.2%	OARnet	US	—	—
199.218.240.0/21	2.0K	8.4%	OARnet	US	—	—
204.57.8.0/21	2.0K	1.0%	OARnet	US	Indiana	West Harrison
205.133.64.0/21	2.0K	6.6%	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	Pickerington
205.133.208.0/21	2.0K	1.7%	OARnet	US	Ohio	Jenera

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
199.120.181.0/24	52,038	2026-07-23 14:37:01
64.254.64.0/20	25,510	2026-07-23 14:37:15
208.108.176.0/21	15,818	2026-07-23 14:37:01
192.88.193.0/24	13,994	2026-07-23 14:42:10
208.108.44.0/24	8,117	2026-07-23 14:37:01
192.88.195.0/24	7,758	2026-07-23 14:42:11
206.21.106.0/24	7,289	2026-07-23 14:37:13
199.218.126.0/23	7,271	2026-07-23 14:37:13
199.218.112.0/24	7,246	2026-07-23 14:37:13
199.218.111.0/24	7,230	2026-07-23 14:37:13
163.11.0.0/16	6,828	2026-07-23 14:38:35
205.133.85.0/24	6,788	2026-07-23 15:48:03
143.246.0.0/17	5,781	2026-07-23 14:38:02
208.108.52.0/24	5,615	2026-07-23 14:37:01
140.228.0.0/20	5,462	2026-07-23 14:38:01
192.150.115.0/24	5,454	2026-07-23 14:42:11
204.128.217.0/24	5,412	2026-07-23 14:37:01
131.238.28.0/24	5,385	2026-07-23 14:37:58
208.108.244.0/22	5,341	2026-07-23 14:37:26
208.108.11.0/24	5,308	2026-07-23 14:37:01
208.108.70.0/24	5,298	2026-07-23 14:37:01
192.153.32.0/24	5,297	2026-07-23 14:42:11
208.108.79.0/24	5,294	2026-07-23 14:37:26
208.108.71.0/24	5,282	2026-07-23 14:37:26
208.108.5.0/24	5,276	2026-07-23 14:37:26
208.108.48.0/24	5,247	2026-07-23 14:37:01
192.232.19.0/24	5,191	2026-07-23 14:41:05
192.148.237.0/24	5,186	2026-07-23 14:41:02
192.148.248.0/22	5,180	2026-07-23 14:42:10
192.148.240.0/21	5,161	2026-07-23 14:42:10
192.148.235.0/24	5,152	2026-07-23 14:42:10
192.153.26.0/23	5,139	2026-07-23 14:42:10
192.148.236.0/22	5,137	2026-07-23 14:42:10
208.108.184.0/21	5,115	2026-07-23 14:37:01
131.187.0.0/16	5,103	2026-07-23 14:37:58
146.85.32.0/19	5,080	2026-07-23 14:38:02
146.85.224.0/19	5,067	2026-07-23 14:38:02
146.85.0.0/19	5,065	2026-07-23 14:38:02
157.134.0.0/16	5,062	2026-07-23 14:38:14
192.148.251.0/24	5,061	2026-07-23 14:42:11
146.85.160.0/19	5,058	2026-07-23 14:38:02
208.108.50.0/24	4,949	2026-07-23 14:37:01
136.227.128.0/21	4,935	2026-07-23 14:37:59
199.18.241.0/24	4,930	2026-07-23 14:37:19
199.18.141.0/24	4,925	2026-07-23 14:37:01
192.153.40.0/23	4,923	2026-07-23 14:42:10
198.30.0.0/16	4,923	2026-07-23 14:37:01
192.88.192.0/22	4,920	2026-07-23 14:42:10
199.18.0.0/16	4,919	2026-07-23 14:37:01
206.21.0.0/16	4,918	2026-07-23 14:37:01

Showing top 50 of 81 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 912.4K IPv4 addresses distributed across 211 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: 2026-07-23 15:55:31 UTC