AS39961 San Francisco Department of Telecommunications and Information Services

United States CCSF ARIN 13 IPv4 prefixes 0 IPv6 prefixes

IPv4 addresses

58,368

IPv6 /48 networks

RPKI

0 valid13 no ROA

Peers and downstreams

Holder

AS name: CCSF
Description: San Francisco Department of Telecommunications and Information Services City and County of San Francisco One Market, Steuart Tower Second Floor, Suite 250 San Francisco, CA 94105
Organisation: San Francisco Department of Telecommunications and Information Services
Abuse contact: Not published
Assigned: 2006-05-23
Registered: 2006-05-24
Record last changed: 2012-03-02 13:03 UTC

208.121.0.0/24 208.121.1.0/24 208.121.128.0/17 208.121.203.0/24 208.121.224.0/24 208.121.225.0/24 208.121.226.0/23 208.121.230.0/24 208.121.32.0/20 208.121.48.0/20 208.121.5.0/24 208.121.6.0/24 208.121.64.0/18

Routing changes

Last 30 days

2026-10-04 03:23 UTC	New neighbour	AS64866	downstream
2026-10-04 03:23 UTC	New neighbour	AS6939	upstream
2026-10-04 03:23 UTC	New prefix	208.121.230.0/24

WHOIS

aut-num:        AS39961
as-name:        CCSF
handle:         AS39961
registrant:     SFDTIS (San Francisco Department of Telecommunications and Information Services)
last changed:   2012-03-02T08:03:18-05:00
registration:   2006-05-24T13:46:37-04:00
source:         ARIN (RDAP)

Routing data

Updated just now

Registry record

Fetched just now from ARIN RDAP

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/39961

const res = await fetch('https://ip-fd.net/api/v1/asn/39961', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/39961', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/39961');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/39961", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

AS6939	Hurricane Electric LLC HURRICANE
AS7018	AT&T Enterprises, LLC ATT-INTERNET4
AS11404	Wave Broadband AS-WAVE-1