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Summary IP address summary information Name
County of Marin Country
Website
Hosted domains
5 IPv4 addresses
7,936 IPv6 addresses
0 ASN type
Government Registry
ARIN Allocated
29 years ago on Jun 23, 1997 Updated
29 years ago on Jun 23, 1997
WHOIS
ASHandle: █████
OrgID: █████
ASName: ██████
ASNumber: AS█████
RegDate: ████-██-██
Updated: ████-██-██
TechHandle: ████-████
Source: ████
Powered by ASN to WHOIS data Important routers in AS10309
What is an ASN? Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.
The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS10309 at robtex .
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Traceroute Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more. Traceroute →
$ traceroute -a -n -q1 -f4 199.88.66.145
traceroute to 199.88.66.145 (199.88.66.145 ): 64 hops max, 52 byte packets
Measurement taken from IPinfo ProbeNet in Fremont, US
On October 2, 2026
Netblock Company Num of IPs County of Marin
2,048 County of Marin
2,048 County of Marin
1,024 County of Marin
1,024 County of Marin
512 County of Marin
512 County of Marin
512 County of Marin
512 County of Marin
512 County of Marin
256
Show more IP Ranges
Powered by IP Ranges data
Places IPs in this network linked to physical places, based on their Wi-Fi networks.
Places IPs 1 1 New IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.
Explore Places There are 3 peers for this ASN.
ASN Name Rank AS7018 AT&T Enterprises, LLC #4 AS33651 Comcast Cable Communications, LLC #1,078 AS33667 Comcast Cable Communications, LLC #1,440
There are 3 upstreams for this ASN.
ASN Name Rank AS7018 AT&T Enterprises, LLC #4 AS33651 Comcast Cable Communications, LLC #1,078 AS33667 Comcast Cable Communications, LLC #1,440
There are 0 downstreams for this ASN.
No downstreams found.
Important routers in AS10309 Share of IPv4 footprint per hexagon Less More
Held location over 90 days 91%
Held location over 1 year 82%
Median days between moves 97 days
Geolocation scope City How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 5 domain names hosted across 5 IP addresses on this ASN.
Pingable IPs 7 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
IP Address ASN Details 199.88.89.65 Ping AS10309 County of Marin #38,082 2.39ms from San Francisco, US 199.88.64.65 Ping AS10309 County of Marin #38,082 4.29ms from Fremont, US 199.88.74.113 Ping AS10309 County of Marin #38,082 2.52ms from San Francisco, US 199.88.66.145 Ping AS10309 County of Marin #38,082 2.48ms from San Francisco, US 199.88.65.206 Ping AS10309 County of Marin #38,082 2.28ms from San Francisco, US 199.88.91.81 Ping AS10309 County of Marin #38,082 2.42ms from San Francisco, US 107.0.46.1 Ping AS10309 County of Marin #38,082 2.95ms from San Francisco, US
Activity A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
Times shown in United States local time (UTC-8). Less More
Peak hour 15:00–16:00
Active hours 11 hrs
Weekend vs weekday weekdays heavier
Busiest day Wed
Network type Government
Geography United States 
Community Center