Autonomous System

AS7377

University of California, San Diego

University of California, San Diego United States 🌐 ucsd.edu

Announced IPs

12,092,928

CIDR prefixes

836

ASN

AS7377

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.

71/100

Moderate

How this score is built

Baseline (neutral) 65
Academic allocation +6
Trust score 71 / 100

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

Network profile

Source: PeeringDB →

Network type Educational/Research

Geographic scope Not Disclosed

Traffic ratio Not Disclosed

Peering policy Open

IRR record AS7377:RS-UCSD AS7377:RS-AMPR-NET

Website ↗

AS7377 — global IP footprint

Cities where AS7377 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
44.160.0.0/12	1.05M	0.2%	University of California, San Diego	US	—	—
44.80.0.0/13	524.3K	0.0%	University of California, San Diego	US	—	—
44.112.0.0/13	524.3K	0.1%	University of California, San Diego	US	New York	Staten Island
44.144.0.0/13	524.3K	3.8%	University of California, San Diego	US	—	—
44.176.0.0/13	524.3K	0.1%	University of California, San Diego	US	—	—
44.104.0.0/14	262.1K	0.0%	—	US	New York	Staten Island
44.120.0.0/14	262.1K	0.1%	University of California, San Diego	US	—	—
44.156.0.0/14	262.1K	0.3%	University of California, San Diego	US	—	—
44.22.0.0/15	131.1K	0.0%	University of California, San Diego	US	Alaska	Ketchikan
44.28.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.38.0.0/15	131.1K	0.0%	University of California, San Diego	US	South Carolina	North Charleston
44.50.0.0/15	131.1K	0.0%	University of California, San Diego	US	Iowa	Swisher
44.54.0.0/15	131.1K	0.1%	University of California, San Diego	US	New York	Staten Island
44.58.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.66.0.0/15	131.1K	0.1%	University of California, San Diego	US	New York	Staten Island
44.74.0.0/15	131.1K	0.0%	University of California, San Diego	US	North Carolina	Concord
44.78.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.88.0.0/15	131.1K	0.1%	University of California, San Diego	US	New York	Staten Island
44.96.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.106.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.128.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.132.0.0/15	131.1K	0.3%	University of California, San Diego	US	—	—
44.142.0.0/15	131.1K	2.9%	University of California, San Diego	US	—	—
44.148.0.0/15	131.1K	0.0%	—	DE	Bavaria	Stein
44.152.0.0/15	131.1K	0.7%	University of California, San Diego	US	—	—
44.156.0.0/15	131.1K	0.0%	—	DE	Bavaria	Stein
44.162.0.0/15	131.1K	0.0%	—	US	—	—
44.166.0.0/15	131.1K	0.0%	—	US	—	—
44.170.0.0/15	131.1K	0.0%	—	US	—	—
44.172.0.0/15	131.1K	0.0%	—	US	—	—
44.178.0.0/15	131.1K	0.0%	—	US	—	—
44.180.0.0/15	131.1K	0.0%	—	US	—	—
44.186.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.188.0.0/15	131.1K	0.0%	University of California, San Diego	US	—	—
44.0.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.13.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.14.0.0/16	65.5K	0.0%	University of California, San Diego	US	Hawaii	Hilo
44.17.0.0/16	65.5K	0.0%	University of California, San Diego	US	California	Palm Springs
44.19.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.21.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.22.0.0/16	65.5K	0.0%	University of California, San Diego	US	Alaska	Ketchikan
44.35.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.37.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.41.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.43.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.45.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.47.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.49.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.53.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.57.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.61.0.0/16	65.5K	0.2%	University of California, San Diego	US	—	—
44.63.0.0/16	65.5K	0.9%	University of California, San Diego	US	—	—
44.65.0.0/16	65.5K	0.0%	University of California, San Diego	US	Arizona	Flagstaff
44.69.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.71.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.73.0.0/16	65.5K	0.4%	University of California, San Diego	US	—	—
44.77.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.91.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.93.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.95.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.99.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.101.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.102.0.0/16	65.5K	1.2%	University of California, San Diego	US	Michigan	Harbor Springs
44.105.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.109.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.111.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.125.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.126.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.129.0.0/16	65.5K	0.0%	—	US	—	—
44.131.0.0/16	65.5K	4.0%	University of California, San Diego	US	—	—
44.132.0.0/16	65.5K	0.0%	—	US	—	—
44.134.0.0/16	65.5K	0.8%	University of California, San Diego	US	—	—
44.138.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.140.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.144.0.0/16	65.5K	0.0%	—	DE	Bavaria	Stein
44.146.0.0/16	65.5K	0.0%	—	DE	Bavaria	Stein
44.150.0.0/16	65.5K	0.0%	—	DE	Bavaria	Stein
44.152.0.0/16	65.5K	0.0%	—	DE	Bavaria	Stein
44.154.0.0/16	65.5K	0.1%	University of California, San Diego	US	—	—
44.159.0.0/16	65.5K	0.0%	—	US	—	—
44.160.0.0/16	65.5K	0.0%	—	US	—	—
44.164.0.0/16	65.5K	0.0%	—	US	—	—
44.169.0.0/16	65.5K	0.0%	—	DE	Bavaria	Stein
44.175.0.0/16	65.5K	0.0%	—	US	—	—
44.177.0.0/16	65.5K	0.0%	—	US	—	—
44.183.0.0/16	65.5K	0.0%	—	US	—	—
44.185.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
44.191.0.0/16	65.5K	0.0%	University of California, San Diego	US	—	—
128.54.0.0/16	65.5K	5.1%	University of California, San Diego	US	California	San Diego
132.239.0.0/16	65.5K	40.5%	University of California, San Diego	US	California	San Diego
137.110.0.0/16	65.5K	21.4%	University of California, San Diego	US	California	San Diego
169.228.0.0/16	65.5K	0.0%	—	US	California	San Diego
44.1.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.2.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.3.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.6.0.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.7.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.8.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.9.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—
44.10.128.0/17	32.8K	0.0%	University of California, San Diego	US	—	—

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS7377 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
44.0.0.0/9	6,561	2026-07-18 11:59:31
44.128.0.0/10	6,526	2026-07-18 11:59:31
69.166.11.0/24	6,074	2026-07-18 12:00:06
198.134.135.0/24	6,012	2026-07-18 12:00:58
207.34.0.0/24	5,980	2026-07-18 12:00:06
216.151.34.0/24	5,965	2026-07-18 12:00:06
216.21.14.0/24	5,960	2026-07-18 12:00:06
216.151.38.0/24	5,948	2026-07-18 12:00:06
137.110.0.0/16	4,307	2026-07-18 12:00:58
128.54.0.0/16	4,301	2026-07-18 12:00:58
132.239.0.0/16	4,292	2026-07-18 12:00:58
169.228.0.0/16	4,292	2026-07-18 12:00:58
69.196.40.0/24	4,290	2026-07-18 12:00:06
69.196.32.0/19	4,287	2026-07-18 12:00:06
69.196.32.0/20	4,285	2026-07-18 12:00:06
192.135.237.0/24	4,191	2026-07-18 12:00:06
192.135.238.0/24	4,190	2026-07-18 12:00:06
192.154.1.0/24	3,938	2026-07-18 10:51:59

Frequently Asked Questions

What is AS7377?

AS7377 is an Autonomous System Number assigned to University of California, San Diego. 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 AS7377 announce?

AS7377 announces 12.09M IPv4 addresses distributed across 836 routed CIDR prefixes. The network is registered in United States.

Who operates AS7377?

AS7377 is operated by University of California, San Diego. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.

What country is AS7377 registered in?

AS7377 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 12:40:28 UTC