ASN AS43 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS43?

AS43 is listed under Brookhaven National Laboratory.

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.

AS43 Brookhaven National Laboratory

ASN Lookup Tool

Brookhaven National Laboratory bnl.gov

US 8 Routes

AS Data

AS43

AS43 – Brookhaven National Laboratory

AS Number	43
AS Name	BNL-AS
Organization	Brookhaven National Laboratory(bnl-z)
Country	US
Website	bnl.gov
Number of IPv4 Routes	5
Number of IPv6 Routes	3
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	1985-04-11

ASN Intelligence API for production workflows

Use ASN data for AS43 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

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
192.12.15.0/24	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	256
2620:12f:f000::/44	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	~19×10²⁴
192.153.161.0/24	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	256
2620:0:210::/48	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	~1×10²⁴
192.203.218.0/24	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	256
2620:10a::/44	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	~19×10²⁴
192.33.128.0/24	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	256
130.199.0.0/16	AS43	Brookhaven National Laboratory	Brookhaven National Laboratory	65536

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:       43
ASName:         BNL-AS
ASHandle:       AS43
RegDate:        1985-04-11
Updated:        2024-12-16    
Ref:            https://rdap.arin.net/registry/autnum/43


OrgName:        Brookhaven National Laboratory
OrgId:          BNL-Z
Address:        61 Brookhaven Ave
Address:        Bldg. 515
City:           Upton
StateProv:      NY
PostalCode:     11973
Country:        US
RegDate:        2024-12-13
Updated:        2025-12-31
Ref:            https://rdap.arin.net/registry/entity/BNL-Z


OrgDNSHandle: MARTI3432-ARIN
OrgDNSName:   Martinson, Andrew 
OrgDNSPhone:  +1-631-241-4345 
OrgDNSEmail:  amartinso@bnl.gov
OrgDNSRef:    https://rdap.arin.net/registry/entity/MARTI3432-ARIN

OrgAbuseHandle: BONAF-ARIN
OrgAbuseName:   Bonafede, Vincent 
OrgAbusePhone:  +1-631-344-2642 
OrgAbuseEmail:  bonafede@bnl.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BONAF-ARIN

OrgTechHandle: BONAF-ARIN
OrgTechName:   Bonafede, Vincent 
OrgTechPhone:  +1-631-344-2642 
OrgTechEmail:  bonafede@bnl.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/BONAF-ARIN

OrgAbuseHandle: MARTI3432-ARIN
OrgAbuseName:   Martinson, Andrew 
OrgAbusePhone:  +1-631-241-4345 
OrgAbuseEmail:  amartinso@bnl.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MARTI3432-ARIN

OrgRoutingHandle: MARTI3432-ARIN
OrgRoutingName:   Martinson, Andrew 
OrgRoutingPhone:  +1-631-241-4345 
OrgRoutingEmail:  amartinso@bnl.gov
OrgRoutingRef:    https://rdap.arin.net/registry/entity/MARTI3432-ARIN

OrgTechHandle: MARTI3432-ARIN
OrgTechName:   Martinson, Andrew 
OrgTechPhone:  +1-631-241-4345 
OrgTechEmail:  amartinso@bnl.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/MARTI3432-ARIN

OrgNOCHandle: MARTI3432-ARIN
OrgNOCName:   Martinson, Andrew 
OrgNOCPhone:  +1-631-241-4345 
OrgNOCEmail:  amartinso@bnl.gov
OrgNOCRef:    https://rdap.arin.net/registry/entity/MARTI3432-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
AS293	ESnet	US

Upstreams

AS Number	Description	Country
AS293	ESnet	US