ASN AS21842 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21842?

AS21842 is listed under PJM Interconnection 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?

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AS21842 PJM Interconnection LLC.

ASN Lookup Tool

PJM Interconnection LLC. pjm.com

US 3 Routes

AS Data

AS21842

AS21842 – PJM Interconnection LLC.

AS Number	21842
AS Name	PJM
Organization	PJM Interconnection LLC.(pil-37)
Country	US
Website	pjm.com
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-06-28

ASN Intelligence API for production workflows

Use ASN data for AS21842 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.251.13.0/24	AS21842	PJM Interconnection LLC.	PJM Interconnection	256
12.104.52.0/23	AS21842	PJM Interconnection LLC.	PJM INTERCONNECTIONATTN ACCO	512
192.251.14.0/24	AS21842	PJM Interconnection LLC.	PJM Interconnection	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:       21842
ASName:         PJM
ASHandle:       AS21842
RegDate:        2001-06-28
Updated:        2013-05-29    
Ref:            https://rdap.arin.net/registry/autnum/21842


OrgName:        PJM Interconnection LLC.
OrgId:          PIL-37
Address:        955 Jefferson Drive
City:           Norristown
StateProv:      PA
PostalCode:     19403
Country:        US
RegDate:        2001-06-28
Updated:        2013-05-29
Ref:            https://rdap.arin.net/registry/entity/PIL-37


OrgNOCHandle: LP148-ARIN
OrgNOCName:   PJM Interconnection, LLC
OrgNOCPhone:  +1-610-666-2244 
OrgNOCEmail:  networking@pjm.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/LP148-ARIN

OrgAbuseHandle: LP148-ARIN
OrgAbuseName:   PJM Interconnection, LLC
OrgAbusePhone:  +1-610-666-2244 
OrgAbuseEmail:  networking@pjm.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LP148-ARIN

OrgTechHandle: LP148-ARIN
OrgTechName:   PJM Interconnection, LLC
OrgTechPhone:  +1-610-666-2244 
OrgTechEmail:  networking@pjm.com
OrgTechRef:    https://rdap.arin.net/registry/entity/LP148-ARIN

RAbuseHandle: LP148-ARIN
RAbuseName:   PJM Interconnection, LLC
RAbusePhone:  +1-610-666-2244 
RAbuseEmail:  networking@pjm.com
RAbuseRef:    https://rdap.arin.net/registry/entity/LP148-ARIN

RTechHandle: LP148-ARIN
RTechName:   PJM Interconnection, LLC
RTechPhone:  +1-610-666-2244 
RTechEmail:  networking@pjm.com
RTechRef:    https://rdap.arin.net/registry/entity/LP148-ARIN

RNOCHandle: LP148-ARIN
RNOCName:   PJM Interconnection, LLC
RNOCPhone:  +1-610-666-2244 
RNOCEmail:  networking@pjm.com
RNOCRef:    https://rdap.arin.net/registry/entity/LP148-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

Peers

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS701	Verizon Business	US