What is ASN AS396303?

ASN AS396303 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS396303?

AS396303 is listed under Black Mesa Corporation.

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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AS396303 Black Mesa Corporation

ASN Lookup Tool

Black Mesa Corporation nat.moe

US 10 Routes

AS Data

AS396303

AS396303 – Black Mesa Corporation

AS Number	396303
AS Name	NATOLAB-LEGACY
Organization	Black Mesa Corporation (nrl-25)
Country	US
Website	nat.moe
Number of IPv4 Routes	0
Number of IPv6 Routes	10
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2017-05-02

ASN Intelligence API for production workflows

Use ASN data for AS396303 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2602:feda:f0d0::/44	AS396303	Black Mesa Corporation	AperNet Singapore	~19×10²⁴
2602:feda:f0f0::/44	AS396303	Black Mesa Corporation	AperNet Singapore	~19×10²⁴
2602:feda:f400::/40	AS396303	Black Mesa Corporation	Black Mesa Corporation	~309×10²⁴
2406:4440:60::/44	AS396303	Black Mesa Corporation	Aperture Science K.K.	~19×10²⁴
2602:feda:f0e0::/44	AS396303	Black Mesa Corporation	AperNet Singapore	~19×10²⁴
2602:feda:105::/48	AS396303	Black Mesa Corporation	Aperture Science LLC	~1×10²⁴
2406:4440:70::/44	AS396303	Black Mesa Corporation	Aperture Science Limited	~19×10²⁴
2406:4440:50::/44	AS396303	Black Mesa Corporation	Aperture Science Pte. Ltd.	~19×10²⁴
2602:feda:102::/48	AS396303	Black Mesa Corporation	Aperture Science LLC	~1×10²⁴
2602:feda:e000::/36	AS396303	Black Mesa Corporation	AperNet Singapore	~5×10²⁷

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:       396303
ASName:         NATOLAB-LEGACY
ASHandle:       AS396303
RegDate:        2017-05-02
Updated:        2020-05-05
Ref:            https://rdap.arin.net/registry/autnum/396303


OrgName:        Black Mesa Corporation
OrgId:          NRL-25
Address:        720 University Ave
Address:        PO Box 35765
City:           Syracuse
StateProv:      NY
PostalCode:     13235
Country:        US
RegDate:        2017-04-24
Updated:        2024-11-04
Comment:        ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Comment:        + Black Mesa Corporation
Comment:        + 
Comment:        + Black Mesa Corporation, a.k.a. Nato Internet Service is a
Comment:        + non-profit project for learning, education and research.
Comment:        +
Comment:        + Our goal is to support the ever-growing internet community
Comment:        + that wants to experiment and gain hands-on experience with
Comment:        + the real world BGP.
Comment:        +
Comment:        + Network Information:
Comment:        + https://internet.nat.moe
Comment:        ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ref:            https://rdap.arin.net/registry/entity/NRL-25

ReferralServer:  rwhois://whois.nat.moe:43

OrgAbuseHandle: NLN2-ARIN
OrgAbuseName:   Nato Laboratory Networking
OrgAbusePhone:  +1-315-744-5708 
OrgAbuseEmail:  noc@nat.moe
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NLN2-ARIN

OrgTechHandle: NLN2-ARIN
OrgTechName:   Nato Laboratory Networking
OrgTechPhone:  +1-315-744-5708 
OrgTechEmail:  noc@nat.moe
OrgTechRef:    https://rdap.arin.net/registry/entity/NLN2-ARIN

OrgTechHandle: LEETO56-ARIN
OrgTechName:   Lee, Tony 
OrgTechPhone:  +1-971-482-5107 
OrgTechEmail:  tony@apernet.io
OrgTechRef:    https://rdap.arin.net/registry/entity/LEETO56-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" : "396303",
    "as_handle" : "AS396303",
    "as_name" : "NATOLAB-LEGACY",
    "tech_contacts" : [ "NLN2-ARIN", "LEETO56-ARIN" ],
    "abuse_contacts" : [ "NLN2-ARIN" ],
    "date_created" : "2017-05-02",
    "date_updated" : "2020-05-05",
    "source" : "https://rdap.arin.net/registry/autnum/396303"
  } ],
  "organization" : {
    "handle" : "NRL-25",
    "name" : "Black Mesa Corporation",
    "address" : [ "720 University Ave", "PO Box 35765", "Syracuse", "NY", "13235", "US" ],
    "street" : "University Ave",
    "city" : "Syracuse",
    "state" : "NY",
    "zip_code" : "13235",
    "country" : [ "US" ],
    "date_created" : "2017-04-24",
    "date_updated" : "2024-11-04",
    "source" : "https://rdap.arin.net/registry/entity/NRL-25",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "NLN2-ARIN",
    "name" : "Nato Laboratory Networking",
    "email" : [ "noc@nat.moe" ],
    "phone" : [ "+1-315-744-5708" ],
    "source" : "https://rdap.arin.net/registry/entity/NLN2-ARIN"
  }, {
    "handle" : "LEETO56-ARIN",
    "name" : "Lee, Tony",
    "email" : [ "tony@apernet.io" ],
    "phone" : [ "+1-971-482-5107" ],
    "source" : "https://rdap.arin.net/registry/entity/LEETO56-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "NLN2-ARIN",
    "name" : "Nato Laboratory Networking",
    "email" : [ "noc@nat.moe" ],
    "phone" : [ "+1-315-744-5708" ],
    "source" : "https://rdap.arin.net/registry/entity/NLN2-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS6939	Hurricane Electric LLC	US
AS38008	Aperture Science Limited	HK

Upstreams

AS Number	Description	Country
AS6939	Hurricane Electric LLC	US
AS38008	Aperture Science Limited	HK