ASN AS21870 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21870?

AS21870 is listed under Juniper Networks, Inc..

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.

AS21870 Juniper Networks, Inc.

ASN Lookup Tool

Search ASN

AS Data

IP Routes

Raw Whois

Parsed Whois

Peers

Upstreams

Downstreams

Contacts

Legacy Routes

Juniper Networks, Inc. juniper.net

US 0 Routes

AS Data

AS21870

AS21870 – Juniper Networks, Inc.

AS Number	21870
AS Name	JUNIPER-HERNDON
Organization	Juniper Networks, Inc.(junipe)
Country	US
Website	juniper.net
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-07-03

ASN Intelligence API for production workflows

Use ASN data for AS21870 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

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:       21870
ASName:         JUNIPER-HERNDON
ASHandle:       AS21870
RegDate:        2001-07-03
Updated:        2018-08-03    
Ref:            https://rdap.arin.net/registry/autnum/21870


OrgName:        Juniper Networks, Inc.
OrgId:          JUNIPE
Address:        Headquarters
Address:        1133 Innovation Way
City:           Sunnyvale
StateProv:      CA
PostalCode:     94089
Country:        US
RegDate:        1996-07-09
Updated:        2015-02-24
Ref:            https://rdap.arin.net/registry/entity/JUNIPE


OrgTechHandle: JNATC-ARIN
OrgTechName:   Juniper Networks ARIN Technical Coordinator
OrgTechPhone:  +1-408-745-2000 
OrgTechEmail:  arin-technical@juniper.net
OrgTechRef:    https://rdap.arin.net/registry/entity/JNATC-ARIN

OrgNOCHandle: JNNSG-ARIN
OrgNOCName:   Juniper Networks Network Services Group
OrgNOCPhone:  +1-408-745-2000 
OrgNOCEmail:  arin-noc@juniper.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/JNNSG-ARIN

OrgAbuseHandle: JNSACG-ARIN
OrgAbuseName:   Juniper Networks Systems Abuse Coordination Group
OrgAbusePhone:  +1-408-745-2000 
OrgAbuseEmail:  abuse@juniper.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/JNSACG-ARIN

RTechHandle: JNNSG-ARIN
RTechName:   Juniper Networks Network Services Group
RTechPhone:  +1-408-745-2000 
RTechEmail:  arin-noc@juniper.net
RTechRef:    https://rdap.arin.net/registry/entity/JNNSG-ARIN

RAbuseHandle: JNSACG-ARIN
RAbuseName:   Juniper Networks Systems Abuse Coordination Group
RAbusePhone:  +1-408-745-2000 
RAbuseEmail:  abuse@juniper.net
RAbuseRef:    https://rdap.arin.net/registry/entity/JNSACG-ARIN

RNOCHandle: JNATC-ARIN
RNOCName:   Juniper Networks ARIN Technical Coordinator
RNOCPhone:  +1-408-745-2000 
RNOCEmail:  arin-technical@juniper.net
RNOCRef:    https://rdap.arin.net/registry/entity/JNATC-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.
#