Autonomous System

AS2152

CENIC

CENIC United States 🌐 cenic.org

Announced IPs

1,890,048

CIDR prefixes

368

ASN

AS2152

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 →

About Corporation for Education Network Initiatives in California

The Corporation for Education Network Initiatives in California is a nonprofit corporation formed in 1997 to provide high-performance, high-bandwidth networking services to California universities and research institutions. Through this corporation, representatives from all of California's K-20 public education combine their networking resources toward the operation, deployment, and maintenance of the California Research and Education Network, or CalREN.

Founded

1996

Headquarters

La Mirada

Official website ↗ Summary from Wikipedia, CC BY-SA 4.0 · Data from Wikidata

⚠ 1 MOAS prefix — multiple origin ASNs detected

All MOAS anomalies →

A previously stable prefix originated by AS2152 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)
132.241.61.0/24	AS2152, AS2153	2026-07-17 17:52:37

Network profile

Source: PeeringDB →

Network type Educational/Research

Traffic level 1-5Tbps

Geographic scope Regional

Traffic ratio Heavy Inbound

Peering policy Selective

IRR record AS-CALRENDC

Present at 7 internet exchanges: NYIIX Los Angeles, Equinix Palo Alto, Equinix Los Angeles, Equinix San Jose, BBIX US-West, MegaIX Los Angeles, MegaIX Bay Area

Website ↗ Looking glass ↗

AS2152 — global IP footprint

Cities where AS2152 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
137.150.0.0/15	131.1K	0.0%	—	US	California	Arcata
130.65.0.0/16	65.5K	6.0%	CENIC	US	California	San Jose
130.157.0.0/16	65.5K	0.0%	CENIC	US	California	Rohnert Park
130.166.0.0/16	65.5K	0.3%	CENIC	US	California	Northridge
130.182.0.0/16	65.5K	0.6%	CENIC	US	California	Los Angeles
132.241.0.0/16	65.5K	0.0%	CENIC	US	California	Chico
134.139.0.0/16	65.5K	36.7%	CENIC	US	California	Long Beach
134.154.0.0/16	65.5K	0.0%	CENIC	US	California	Hayward
137.145.0.0/16	65.5K	0.1%	CENIC	US	California	Hermosa Beach
137.151.0.0/16	65.5K	4.2%	CENIC	US	California	Fullerton
139.182.0.0/16	65.5K	8.1%	CENIC	US	California	Riverside
144.37.0.0/16	65.5K	0.3%	CENIC	US	California	Escondido
146.244.0.0/16	65.5K	0.8%	CENIC	US	California	San Diego
147.144.0.0/16	65.5K	0.0%	CENIC	US	California	South San Francisco
155.135.0.0/16	65.5K	0.0%	CENIC	US	California	Long Beach
160.227.0.0/16	65.5K	0.2%	CENIC	US	California	Spring Valley
165.196.0.0/16	65.5K	0.8%	CENIC	US	California	Sacramento
198.189.0.0/16	65.5K	0.0%	—	US	California	Monterey
130.191.128.0/17	32.8K	3.0%	CENIC	US	California	San Diego
130.212.128.0/17	32.8K	0.8%	CENIC	US	California	San Francisco
136.168.0.0/17	32.8K	41.8%	CENIC	US	California	Bakersfield
137.150.0.0/17	32.8K	0.2%	CENIC	US	California	Eureka
137.164.128.0/17	32.8K	0.0%	—	US	California	City of Angels
198.188.128.0/17	32.8K	0.0%	—	US	California	Los Angeles
198.189.0.0/17	32.8K	1.5%	CENIC	US	California	Monterey
205.155.128.0/17	32.8K	0.0%	—	US	California	Douglas City
207.62.128.0/17	32.8K	0.0%	—	US	California	San Mateo
207.233.0.0/17	32.8K	0.0%	—	US	California	Hemet
209.188.128.0/17	32.8K	0.0%	CENIC	US	California	Daly City
130.150.0.0/18	16.4K	0.0%	—	US	—	—
130.150.128.0/18	16.4K	0.0%	CENIC	US	—	—
130.212.0.0/18	16.4K	2.7%	CENIC	US	California	San Francisco
136.168.128.0/18	16.4K	3.9%	CENIC	US	California	Bakersfield
137.150.192.0/18	16.4K	0.0%	CENIC	US	California	Arcata
198.188.64.0/18	16.4K	0.0%	—	US	California	Los Angeles
204.102.64.0/18	16.4K	0.0%	—	US	California	San Francisco
204.102.128.0/18	16.4K	0.2%	CENIC	US	California	Los Angeles
205.155.0.0/18	16.4K	0.0%	—	US	California	Watsonville
205.155.128.0/18	16.4K	14.0%	CENIC	US	California	Burnt Ranch
207.62.192.0/18	16.4K	2.2%	CENIC	US	California	Belmont
209.129.64.0/18	16.4K	3.8%	CENIC	US	California	San Francisco
209.129.128.0/18	16.4K	4.8%	CENIC	US	California	Saratoga
130.17.0.0/19	8.2K	37.9%	CENIC	US	—	—
130.150.32.0/19	8.2K	0.0%	CENIC	US	—	—
130.150.96.0/19	8.2K	0.0%	CENIC	US	—	—
130.191.0.0/19	8.2K	5.4%	CENIC	US	California	San Diego
130.191.64.0/19	8.2K	1.8%	CENIC	US	California	Spring Valley
130.212.64.0/19	8.2K	1.9%	CENIC	US	California	San Francisco
136.168.192.0/19	8.2K	11.2%	CENIC	US	—	—
137.150.160.0/19	8.2K	0.0%	CENIC	US	California	Oakley
137.164.0.0/19	8.2K	0.0%	—	US	California	Pala
137.164.96.0/19	8.2K	0.0%	—	US	California	Crescent City
137.164.160.0/19	8.2K	0.2%	CENIC	US	California	Truckee
198.188.0.0/19	8.2K	0.0%	—	US	California	Los Angeles
198.188.96.0/19	8.2K	0.3%	CENIC	US	California	South Gate
204.102.64.0/19	8.2K	0.2%	CENIC	US	California	San Francisco
204.102.192.0/19	8.2K	0.0%	—	US	California	Salinas
205.154.0.0/19	8.2K	0.0%	—	US	California	Pasadena
205.154.160.0/19	8.2K	0.0%	—	US	California	Los Angeles
205.154.192.0/19	8.2K	1.9%	CENIC	US	California	Riverside
205.155.96.0/19	8.2K	0.2%	CENIC	US	—	—
205.155.192.0/19	8.2K	0.0%	CENIC	US	California	Chico
206.224.224.0/19	8.2K	0.3%	CENIC	US	California	Orange
207.62.32.0/19	8.2K	0.0%	—	US	California	Modesto
207.233.0.0/19	8.2K	0.5%	CENIC	US	California	Hemet
207.233.64.0/19	8.2K	1.4%	CENIC	US	California	Long Beach
209.129.32.0/19	8.2K	0.0%	—	US	California	Oceanside
209.129.192.0/19	8.2K	0.3%	CENIC	US	California	Oakland
64.39.112.0/20	4.1K	0.0%	CENIC	US	California	Ukiah
130.17.16.0/20	4.1K	2.0%	CENIC	ES	—	—
130.150.16.0/20	4.1K	0.0%	CENIC	US	—	—
130.150.208.0/20	4.1K	0.0%	CENIC	US	—	—
130.150.224.0/20	4.1K	0.0%	CENIC	US	—	—
130.191.32.0/20	4.1K	4.4%	CENIC	US	California	Chula Vista
130.191.112.0/20	4.1K	3.1%	CENIC	US	—	—
130.212.96.0/20	4.1K	0.1%	CENIC	US	—	—
136.168.224.0/20	4.1K	0.0%	—	US	—	—
137.150.144.0/20	4.1K	1.3%	CENIC	US	—	—
137.164.0.0/20	4.1K	28.1%	CENIC	US	California	San Diego
137.164.32.0/20	4.1K	13.2%	CENIC	US	California	Alhambra
137.164.64.0/20	4.1K	0.1%	CENIC	US	California	Santa Ana
137.164.96.0/20	4.1K	0.5%	CENIC	US	California	Crescent City
137.164.144.0/20	4.1K	0.0%	CENIC	US	California	Alturas
137.164.192.0/20	4.1K	0.3%	CENIC	US	California	Tuolumne
137.164.240.0/20	4.1K	2.2%	CENIC	US	California	City of Angels
165.74.16.0/20	4.1K	0.1%	CENIC	US	—	—
198.188.32.0/20	4.1K	0.0%	CENIC	US	California	Los Angeles
198.188.64.0/20	4.1K	0.0%	CENIC	US	—	—
198.188.128.0/20	4.1K	0.1%	CENIC	US	California	Los Angeles
198.189.144.0/20	4.1K	13.7%	CENIC	US	California	Ukiah
198.189.160.0/20	4.1K	0.5%	CENIC	US	—	—
204.102.16.0/20	4.1K	0.0%	—	US	—	—
204.102.32.0/20	4.1K	0.0%	—	US	California	Anaheim
204.102.96.0/20	4.1K	4.2%	CENIC	US	—	—
204.102.208.0/20	4.1K	0.0%	CENIC	US	California	Glendale
204.102.240.0/20	4.1K	2.6%	CENIC	US	California	Alhambra
205.154.48.0/20	4.1K	0.0%	—	US	—	—
205.154.224.0/20	4.1K	0.0%	—	US	California	Fontana
205.155.80.0/20	4.1K	4.6%	CENIC	US	—	—
207.62.16.0/20	4.1K	0.0%	CENIC	US	California	Templeton

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS2152 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
216.231.241.0/24	310,398	2026-07-18 10:52:00
198.189.234.0/24	18,395	2026-07-17 18:09:01
137.151.252.0/23	18,320	2026-07-18 10:51:59
207.166.60.0/24	17,122	2026-07-18 10:52:00
204.89.147.0/24	17,120	2026-07-18 10:52:00
198.137.152.0/24	16,807	2026-07-18 10:52:00
163.150.244.0/23	11,757	2026-07-18 10:51:58
141.174.90.0/24	11,215	2026-07-18 10:51:59
147.144.128.0/17	10,800	2026-07-18 10:52:00
147.144.0.0/17	10,713	2026-07-18 10:52:00
198.137.151.0/24	10,506	2026-07-18 10:52:00
206.78.236.0/22	10,039	2026-07-18 10:51:59
204.17.179.0/24	8,120	2026-07-18 10:51:58
198.102.103.0/24	8,032	2026-07-18 10:51:58
206.15.240.0/24	7,782	2026-07-18 10:52:00
207.166.55.0/24	7,240	2026-07-18 10:51:59
207.166.0.0/24	7,237	2026-07-18 10:51:59
207.166.1.0/24	7,233	2026-07-18 10:51:59
209.132.159.0/24	7,230	2026-07-18 10:51:59
206.15.254.0/23	7,218	2026-07-18 10:51:59
206.15.235.0/24	7,194	2026-07-18 10:52:00
209.132.158.0/24	7,085	2026-07-18 10:51:59
207.166.2.0/23	6,983	2026-07-18 10:51:59
207.166.58.0/24	6,972	2026-07-18 10:51:59
204.69.4.0/24	6,393	2026-07-18 10:51:58
137.151.0.0/16	6,302	2026-07-18 10:51:58
165.196.0.0/16	6,253	2026-07-18 10:51:59
192.189.47.0/24	6,139	2026-07-18 10:52:00
204.75.250.0/23	5,946	2026-07-18 10:52:00
192.189.45.0/24	5,939	2026-07-18 10:52:00
192.189.48.0/24	5,938	2026-07-18 10:52:00
206.15.246.0/24	5,887	2026-07-18 10:51:59
206.15.236.0/22	5,884	2026-07-18 10:51:59
206.15.245.0/24	5,860	2026-07-18 10:51:59
206.15.243.0/24	5,857	2026-07-18 10:51:59
132.241.61.0/24	5,811	2026-07-18 10:51:59
132.241.0.0/16	5,687	2026-07-18 10:51:59
165.74.16.0/20	5,630	2026-07-18 10:51:59
198.49.104.0/24	5,629	2026-07-18 10:51:59
206.15.224.0/23	5,607	2026-07-18 10:51:59
198.32.251.0/24	5,579	2026-07-18 10:51:59
134.154.120.0/21	5,568	2026-07-18 10:51:58
206.15.251.0/24	5,564	2026-07-18 10:51:59
134.154.222.0/24	5,559	2026-07-18 10:51:58
134.154.2.0/24	5,558	2026-07-18 10:51:58
137.164.16.0/24	5,543	2026-07-18 10:51:59
144.37.128.0/17	5,420	2026-07-18 10:51:58
69.48.214.0/23	5,404	2026-07-18 10:51:59
206.15.228.0/23	5,404	2026-07-18 10:51:59
206.15.226.0/23	5,398	2026-07-18 10:51:59

Showing top 50 of 748 announced prefixes by sample volume.

Frequently Asked Questions

What is AS2152?

AS2152 is an Autonomous System Number assigned to CENIC. 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 AS2152 announce?

AS2152 announces 1.89M IPv4 addresses distributed across 368 routed CIDR prefixes. The network is registered in United States.

Who operates AS2152?

AS2152 is operated by CENIC. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS2152 registered in?

AS2152 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: 2026-07-18 11:25:31 UTC