ASN AS21858 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21858?

AS21858 is listed under Ascent Data, LLC.

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?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS21858 Ascent Data, LLC | IPGeolocation.io

ASN Lookup Tool

Ascent Data, LLC ascentdata.com

US 7 Routes

AS Data

AS21858

AS21858 – Ascent Data, LLC

AS Number	21858
AS Name	ASCENT-DATA-LLC
Organization	Ascent Data, LLC (ascen-37)
Country	US
Website	ascentdata.com
Number of IPv4 Routes	6
Number of IPv6 Routes	1
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-06-29

ASN Intelligence API for production workflows

Use ASN data for AS21858 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
208.70.71.0/24	AS21858	Ascent Data, LLC	Ascent Data, LLC	256
208.70.64.0/23	AS21858	Ascent Data, LLC	Ascent Data, LLC	512
208.70.64.0/24	AS21858	Ascent Data, LLC	Ascent Data, LLC	256
208.70.66.0/24	AS21858	Ascent Data, LLC	Ascent Data, LLC	256
2607:ffa8::/32	AS21858	Ascent Data, LLC	Ascent Data, LLC	~79×10²⁷
208.70.64.0/21	AS21858	Ascent Data, LLC	Ascent Data, LLC	2048
208.70.68.0/24	AS21858	Ascent Data, LLC	Crown Castle International	256

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:       21858
ASName:         ASCENT-DATA-LLC
ASHandle:       AS21858
RegDate:        2001-06-29
Updated:        2012-03-02
Ref:            https://rdap.arin.net/registry/autnum/21858


OrgName:        Ascent Data, LLC
OrgId:          ASCEN-37
Address:        90 Beta Drive
City:           Pittsburgh
StateProv:      PA
PostalCode:     15238
Country:        US
RegDate:        2009-06-29
Updated:        2017-09-06
Ref:            https://rdap.arin.net/registry/entity/ASCEN-37


OrgAbuseHandle: RESPO1-ARIN
OrgAbuseName:   Response Center
OrgAbusePhone:  +1-412-968-4030 
OrgAbuseEmail:  support@ascentdata.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RESPO1-ARIN

OrgTechHandle: ADTC-ARIN
OrgTechName:   Ascent Data Technical Contact
OrgTechPhone:  +1-412-968-4000 
OrgTechEmail:  gjabra@ascentdata.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ADTC-ARIN

OrgNOCHandle: RESPO1-ARIN
OrgNOCName:   Response Center
OrgNOCPhone:  +1-412-968-4030 
OrgNOCEmail:  support@ascentdata.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/RESPO1-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" : "21858",
    "as_handle" : "AS21858",
    "as_name" : "ASCENT-DATA-LLC",
    "tech_contacts" : [ "ADTC-ARIN" ],
    "abuse_contacts" : [ "RESPO1-ARIN" ],
    "date_created" : "2001-06-29",
    "date_updated" : "2012-03-02",
    "source" : "https://rdap.arin.net/registry/autnum/21858"
  } ],
  "organization" : {
    "handle" : "ASCEN-37",
    "name" : "Ascent Data, LLC",
    "address" : [ "90 Beta Drive", "Pittsburgh", "PA", "15238", "US" ],
    "street" : "Beta Drive",
    "city" : "Pittsburgh",
    "state" : "PA",
    "zip_code" : "15238",
    "country" : [ "US" ],
    "date_created" : "2009-06-29",
    "date_updated" : "2017-09-06",
    "source" : "https://rdap.arin.net/registry/entity/ASCEN-37",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ADTC-ARIN",
    "name" : "Ascent Data Technical Contact",
    "email" : [ "gjabra@ascentdata.com" ],
    "phone" : [ "+1-412-968-4000" ],
    "source" : "https://rdap.arin.net/registry/entity/ADTC-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "RESPO1-ARIN",
    "name" : "Response Center",
    "email" : [ "support@ascentdata.com" ],
    "phone" : [ "+1-412-968-4030" ],
    "source" : "https://rdap.arin.net/registry/entity/RESPO1-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS11924	Montana Opticom, LLC	US
AS46887	Crown Castle Fiber LLC	US
AS6461	Zayo Bandwidth	US

Upstreams

AS Number	Description	Country
AS11924	Montana Opticom, LLC	US
AS46887	Crown Castle Fiber LLC	US
AS6461	Zayo Bandwidth	US

Downstreams

AS Number	Description	Country
AS11924	Montana Opticom, LLC	US