View

If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	156.39.0.0/24	City of San Jose
	156.39.1.0/24	City of San Jose
	156.39.2.0/24	City of San Jose
	156.39.3.0/24	City of San Jose
	156.39.5.0/24	City of San Jose
	156.39.10.0/24	City of San Jose
	156.39.11.0/24	City of San Jose
	156.39.12.0/24	City of San Jose
	156.39.13.0/24	City of San Jose
	156.39.15.0/24	City of San Jose
	156.39.28.0/24	City of San Jose
	156.39.48.0/21	City of San Jose
	156.39.60.0/24	City of San Jose
	156.39.62.0/24	City of San Jose
	156.39.63.0/24	City of San Jose
	156.39.64.0/22	City of San Jose
	156.39.68.0/24	City of San Jose
	156.39.69.0/24	City of San Jose
	156.39.73.0/24	City of San Jose
	156.39.99.0/24	City of San Jose
	156.39.125.0/24	City of San Jose
	156.39.127.0/24	City of San Jose
	156.39.131.0/24	City of San Jose
	156.39.136.0/21	City of San Jose
	156.39.160.0/24	City of San Jose
	2001:470:f0::/48	Hurricane Electric LLC

---

Network Policy

Click here to learn more about what this graph means and what makes up a network policy Global Aggregation (disabled due to size) Policy keen_blackburn Policy xenodochial_minsky Policy blissful_bhabha Policy peaceful_nobel Policy focused_greider

Chart Display Options

Display links using non straight lines

Prefixes in selected policy

Load all prefixes in policy

---

How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3257	GTT Communications Inc.	✔	✘
	AS6939	Hurricane Electric LLC	✔	✔
	AS7018	AT&T Enterprises, LLC	✔	✘

---

Peers

	ASN	Description	IPv4	IPv6
	AS6939	Hurricane Electric LLC	✔	✔
	AS3257	GTT Communications Inc.	✔	✘
	AS7018	AT&T Enterprises, LLC	✔	✘
	AS8928	GTT Communications Inc.	✔	✘
	AS21859	Zenlayer Inc	✔	✘

ASHandle:       AS21589
OrgID:          CSJ-1
ASName:         CSJ-INTERNET
ASNumber:       21589
RegDate:        2012-10-04
Updated:        2012-10-04
Source:         ARIN



OrgID:          CSJ-1
OrgName:        City of San Jose
CanAllocate:    
Street:         200 E. Santa Clara St.
City:           San Jose
State/Prov:     CA
Country:        US
PostalCode:     95113
RegDate:        1991-12-09
Updated:        2019-05-21
OrgAdminHandle: DNSAD188-ARIN
OrgTechHandle:  CASTI255-ARIN
OrgTechHandle:  DNSAD188-ARIN
OrgAbuseHandle: DNSAD188-ARIN
Source:         ARIN





OrgAdminHandle:       DNSAD188-ARIN
OrgAdminName:          DNS Admins
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CASTI255-ARIN
OrgTechName:          James Castillo
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        DNSAD188-ARIN
OrgTechName:           DNS Admins
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       DNSAD188-ARIN
OrgAbuseName:          DNS Admins
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-06-12T03:25:33Z UTC

---

Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-gttcust	91770
RADB	as-hurricanev6	21146
RADB	as-hurricane	25039
RIPE	as-transroute-spec	19618