208.121.48.0/20

AS39961 · San Francisco Department of Telecommunications and Information Services

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Summary

Country	United States
Domain	sf.gov
ASN	AS39961
Registry	ARIN
ID	CCSF

WHOIS Details

NetHandle:      NET-208-121-0-0-1
OrgID:          SFDTIS
Parent:         NET-208-0-0-0-0
NetName:        CCSF
NetRange:       208.121.0.0 - 208.121.255.255
NetType:        allocation
Comment:        Contact: dt.ops@sfgov.org Standard NOC hours are: 8:00
Comment:        a.m to 5:00 p.m. PST Business days. 415-581-7100
RegDate:        2006-05-11
Updated:        2021-12-14
Source:         ARIN


OrgID:          SFDTIS
OrgName:        San Francisco Department of Telecommunications and Information Services
CanAllocate:    
Street:         One South Van Ness Avenue
Street:         2nd Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94103
Comment:        Contact dt.ops@sfgov.org, 1-628-652-5100
RegDate:        2005-06-14
Updated:        2024-11-05
OrgAdminHandle: GRY9-ARIN
OrgTechHandle:  BELLB45-ARIN
OrgTechHandle:  GRY9-ARIN
OrgAbuseHandle: DTSEC-ARIN
OrgNOCHandle:   NOC3189-ARIN
Source:         ARIN


POCHandle:      GRY9-ARIN
IsRole:         N
LastName:       Ybanez
FirstName:      Glacier
Street:         One South Van Ness Avenue
Street:         2nd floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94103
RegDate:        2011-06-13
Updated:        2025-03-04
OfficePhone:    +1-415-716-8419
Mailbox:        glacier.ybanez@sf.gov
Source:         ARIN


POCHandle:      BELLB45-ARIN
IsRole:         N
LastName:       Bell
FirstName:      Bradley
Street:         1 South Van Ness Ave, 2nd Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94103
RegDate:        2023-04-21
Updated:        2025-07-14
OfficePhone:    +1-949-216-0013
Mailbox:        brad.bell@sfgov.org
Source:         ARIN


POCHandle:      NOC3189-ARIN
IsRole:         Y
LastName:       Network Operations Center
FirstName:      
Street:         One South Van Ness
Street:         2nd Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94103
RegDate:        2008-08-01
Updated:        2026-01-06
OfficePhone:    +1-415-581-7170
Mailbox:        dt.ops@sfgov.org
Source:         ARIN


POCHandle:      DTSEC-ARIN
IsRole:         Y
LastName:       DT Security
FirstName:      
Street:         1 South Van Ness Avenue
Street:         #250
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94103
RegDate:        2015-10-05
Updated:        2025-05-17
OfficePhone:    +1-628-652-5000
Mailbox:        cyberdefense@sfgov.org
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 208.121.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

9 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
208.121.55.28	AS39961 San Francisco Department of Telecommunications and Information Services	`5.44ms` from San Jose, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
85.214.136.212	AS6724 Strato GmbH	`0.52ms` from Berlin, DE
35.202.8.212	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
217.253.64.228	AS3320 Deutsche Telekom AG	`3.23ms` from Duesseldorf, DE
93.103.241.100	AS34779 T-2, d.o.o.	`1.39ms` from Ljubljana, SI
84.67.23.148	AS5378 Vodafone Limited	`5.64ms` from London, GB
62.57.117.196	AS6739 VODAFONE ONO, S.A.	`11.93ms` from Madrid, ES
209.35.4.164	AS133944 trafficforce, UAB	`0.22ms` from Milan, IT
72.185.114.196	AS33363 Charter Communications, Inc	`9.68ms` from Orlando, US
91.121.142.228	AS16276 OVH SAS	`0.10ms` from Roubaix, FR
188.124.39.36	AS49505 JSC Selectel	`0.47ms` from Saint Petersburg, RU
191.239.241.36	AS8075 Microsoft Corporation	`0.20ms` from Sao Paulo, BR
125.230.30.132	AS3462 Data Communication Business Group	`2.30ms` from Taichung, TW
180.49.206.212	AS4713 NTT DOCOMO BUSINESS,Inc.	`3.70ms` from Tokyo, JP
95.99.76.52	AS50266 Odido Netherlands B.V.	`3.53ms` from Amsterdam, NL
181.237.58.116	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`3.06ms` from Bogota, CO
100.10.23.244	AS701 Verizon Business	`2.54ms` from Boston, US
222.162.94.244	AS4837 CHINA UNICOM China169 Backbone	`6.52ms` from Changchun, CN
223.190.203.116	AS24560 Bharti Airtel Ltd., Telemedia Services	`13.84ms` from Chennai, IN
76.76.93.132	AS17306 JAB Wireless, INC.	`3.22ms` from Denver, US
168.199.191.244	AS212238 Datacamp Limited	`0.51ms` from Dublin, IE
79.197.87.164	AS3320 Deutsche Telekom AG	`5.99ms` from Frankfurt am Main, DE
117.6.139.20	AS7552 Viettel Group	`2.19ms` from Hanoi, VN
74.177.192.84	AS8075 Microsoft Corporation	`0.22ms` from London, GB
98.56.179.84	AS7922 Comcast Cable Communications, LLC	`10.54ms` from Los Angeles, US
2.139.74.212	AS3352 TELEFONICA DE ESPANA S.A.U.	`1.45ms` from Madrid, ES

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f3 -m12 208.121.51.190

traceroute to 208.121.51.190 (208.121.51.190): 12 hops max, 52 byte packets

3 [AS3257] 209.120.246.141 0.954 ms

4 [AS3257] 89.149.180.134 40.928 ms

5 [AS3257] 69.174.9.186 41.487 ms

6 [AS11404] 208.52.29.2 46.255 ms

7 [AS39961] 208.121.0.254 46.664 ms

8 *

9 [AS39961] 208.121.0.254 46.954 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Dallas, US

On January 18th 2026

What are IP address ranges?

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Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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