ASN AS25753 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS25753?

AS25753 is listed under California Public Employees' Retirement System.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

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AS25753 California Public Employees' Retirement System

ASN Lookup Tool

California Public Employees' Retirement System calpers.ca.gov

US 16 Routes

AS Data

AS25753

AS25753 – California Public Employees' Retirement System

AS Number	25753
AS Name	CALPERS
Organization	California Public Employees' Retirement System (calper)
Country	US
Website	calpers.ca.gov
Number of IPv4 Routes	16
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2002-05-02

ASN Intelligence API for production workflows

Use ASN data for AS25753 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
199.164.37.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.60.0/22	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	1024
199.164.58.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.39.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.56.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.61.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.59.0/24	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	256
199.164.56.0/23	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	512
199.164.36.0/22	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	1024
199.164.58.0/23	AS25753	California Public Employees Retirement System	California Public Employees Retirement System	512

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       25753
ASName:         CALPERS
ASHandle:       AS25753
RegDate:        2002-05-02
Updated:        2022-05-03
Ref:            https://rdap.arin.net/registry/autnum/25753


OrgName:        California Public Employees' Retirement System
OrgId:          CALPER
Address:        400 Q Street
City:           Sacramento
StateProv:      CA
PostalCode:     95811
Country:        US
RegDate:        2001-10-17
Updated:        2019-05-17
Ref:            https://rdap.arin.net/registry/entity/CALPER


OrgAbuseHandle: BADGE-ARIN
OrgAbuseName:   Badger, John 
OrgAbusePhone:  +1-916-709-2636 
OrgAbuseEmail:  john_badger@calpers.ca.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BADGE-ARIN

OrgTechHandle: NMS9-ARIN
OrgTechName:   NMS
OrgTechPhone:  +1-916-795-9191 
OrgTechEmail:  nms@calpers.ca.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/NMS9-ARIN

RTechHandle: NMS9-ARIN
RTechName:   NMS
RTechPhone:  +1-916-795-9191 
RTechEmail:  nms@calpers.ca.gov
RTechRef:    https://rdap.arin.net/registry/entity/NMS9-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "25753",
    "as_handle" : "AS25753",
    "as_name" : "CALPERS",
    "tech_contacts" : [ "NMS9-ARIN", "NMS9-ARIN" ],
    "abuse_contacts" : [ "BADGE-ARIN" ],
    "date_created" : "2002-05-02",
    "date_updated" : "2022-05-03",
    "source" : "https://rdap.arin.net/registry/autnum/25753"
  } ],
  "organization" : {
    "handle" : "CALPER",
    "name" : "California Public Employees' Retirement System",
    "address" : [ "400 Q Street", "Sacramento", "CA", "95811", "US" ],
    "street" : "Q Street",
    "city" : "Sacramento",
    "state" : "CA",
    "zip_code" : "95811",
    "country" : [ "US" ],
    "date_created" : "2001-10-17",
    "date_updated" : "2019-05-17",
    "source" : "https://rdap.arin.net/registry/entity/CALPER",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "NMS9-ARIN",
    "name" : "NMS",
    "email" : [ "nms@calpers.ca.gov" ],
    "phone" : [ "+1-916-795-9191" ],
    "source" : "https://rdap.arin.net/registry/entity/NMS9-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "BADGE-ARIN",
    "name" : "Badger, John",
    "email" : [ "john_badger@calpers.ca.gov" ],
    "phone" : [ "+1-916-709-2636" ],
    "source" : "https://rdap.arin.net/registry/entity/BADGE-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS701	Verizon Business/UUnet	US
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US