ASN AS18693 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS18693?

AS18693 is listed under University of Colorado Hospital.

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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AS18693 University of Colorado Hospital

ASN Lookup Tool

University of Colorado Hospital uchealth.org

US 4 Routes

AS Data

AS18693

AS18693 – University of Colorado Hospital

AS Number	18693
AS Name	UCH-CENTRAL
Organization	University of Colorado Hospital (ucha)
Country	US
Website	uchealth.org
Number of IPv4 Routes	4
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2013-06-04

ASN Intelligence API for production workflows

Use ASN data for AS18693 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
24.155.10.0/24	AS18693	University of Colorado Hospital	Grande Communications	256
168.200.5.0/24	AS18693	University of Colorado Hospital	University of Colorado Hospital	256
168.200.6.0/24	AS18693	University of Colorado Hospital	University of Colorado Hospital	256
168.200.2.0/23	AS18693	University of Colorado Hospital	University of Colorado Hospital	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:       18693
ASName:         UCH-CENTRAL
ASHandle:       AS18693
RegDate:        2013-06-04
Updated:        2013-06-04
Ref:            https://rdap.arin.net/registry/autnum/18693


OrgName:        University of Colorado Hospital
OrgId:          UCHA
Address:        13001 East 17th Place
Address:        UH Fitzsimons bldg 500 5th floor east
Address:        Information Services
City:           Aurora
StateProv:      CO
PostalCode:     80045-0505
Country:        US
RegDate:        1993-09-09
Updated:        2026-07-23
Ref:            https://rdap.arin.net/registry/entity/UCHA


OrgTechHandle: DNSIP-ARIN
OrgTechName:   dns-ip-admin
OrgTechPhone:  +1-303-752-7800 
OrgTechEmail:  dnsadmins@uchealth.org
OrgTechRef:    https://rdap.arin.net/registry/entity/DNSIP-ARIN

OrgAbuseHandle: DNSIP-ARIN
OrgAbuseName:   dns-ip-admin
OrgAbusePhone:  +1-303-752-7800 
OrgAbuseEmail:  dnsadmins@uchealth.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DNSIP-ARIN

OrgDNSHandle: DNSIP-ARIN
OrgDNSName:   dns-ip-admin
OrgDNSPhone:  +1-303-752-7800 
OrgDNSEmail:  dnsadmins@uchealth.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/DNSIP-ARIN

OrgRoutingHandle: DNSIP-ARIN
OrgRoutingName:   dns-ip-admin
OrgRoutingPhone:  +1-303-752-7800 
OrgRoutingEmail:  dnsadmins@uchealth.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/DNSIP-ARIN

OrgNOCHandle: DNSIP-ARIN
OrgNOCName:   dns-ip-admin
OrgNOCPhone:  +1-303-752-7800 
OrgNOCEmail:  dnsadmins@uchealth.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/DNSIP-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" : "18693",
    "as_handle" : "AS18693",
    "as_name" : "UCH-CENTRAL",
    "admin_contacts" : [ "DNSIP-ARIN" ],
    "tech_contacts" : [ "DNSIP-ARIN", "DNSIP-ARIN" ],
    "abuse_contacts" : [ "DNSIP-ARIN" ],
    "date_created" : "2013-06-04",
    "date_updated" : "2013-06-04",
    "source" : "https://rdap.arin.net/registry/autnum/18693"
  } ],
  "organization" : {
    "handle" : "UCHA",
    "name" : "University of Colorado Hospital",
    "address" : [ "13001 East 17th Place", "UH Fitzsimons bldg 500 5th floor east", "Information Services", "Aurora", "CO", "80045-0505", "US" ],
    "street" : "East 17th Place Uh Fitzsimons",
    "city" : "Aurora",
    "state" : "CO",
    "zip_code" : "80045-0505",
    "country" : [ "US" ],
    "date_created" : "1993-09-09",
    "date_updated" : "2026-07-23",
    "source" : "https://rdap.arin.net/registry/entity/UCHA",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "DNSIP-ARIN",
    "name" : "dns-ip-admin",
    "email" : [ "dnsadmins@uchealth.org" ],
    "phone" : [ "+1-303-752-7800" ],
    "source" : "https://rdap.arin.net/registry/entity/DNSIP-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "DNSIP-ARIN",
    "name" : "dns-ip-admin",
    "email" : [ "dnsadmins@uchealth.org" ],
    "phone" : [ "+1-303-752-7800" ],
    "source" : "https://rdap.arin.net/registry/entity/DNSIP-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "DNSIP-ARIN",
    "name" : "dns-ip-admin",
    "email" : [ "dnsadmins@uchealth.org" ],
    "phone" : [ "+1-303-752-7800" ],
    "source" : "https://rdap.arin.net/registry/entity/DNSIP-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS7459	Grande Communications Networks, LLC	US
AS209	CenturyLink Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS7459	Grande Communications Networks, LLC	US
AS209	CenturyLink Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US