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AS40397 First Manhattan Co. | IPGeolocation.io

Q: Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

ASN Lookup Tool

First Manhattan Co. firstmanhattan.com

US 1 Routes

AS Data

AS40397

AS40397 – First Manhattan Co.

AS Number	40397
AS Name	FIRST-MANHATTAN
Organization	First Manhattan Co. (fm-1)
Country	US
Website	firstmanhattan.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2011-07-06

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Use ASN data for AS40397 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
65.199.161.0/24	AS40397	First Manhattan Co.	First Manhattan Co.	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:       40397
ASName:         FIRST-MANHATTAN
ASHandle:       AS40397
RegDate:        2011-07-06
Updated:        2022-01-10
Ref:            https://rdap.arin.net/registry/autnum/40397


OrgName:        First Manhattan Co.
OrgId:          FM-1
Address:        399 Park Ave
Address:        27th Floor
City:           New York
StateProv:      NY
PostalCode:     10022
Country:        US
RegDate:        2011-06-17
Updated:        2022-01-07
Ref:            https://rdap.arin.net/registry/entity/FM-1


OrgAbuseHandle: ARIN49-ARIN
OrgAbuseName:   arin
OrgAbusePhone:  +1-212-756-3300 
OrgAbuseEmail:  arin@firstmanhattan.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ARIN49-ARIN

OrgTechHandle: ARIN49-ARIN
OrgTechName:   arin
OrgTechPhone:  +1-212-756-3300 
OrgTechEmail:  arin@firstmanhattan.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ARIN49-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" : "40397",
    "as_handle" : "AS40397",
    "as_name" : "FIRST-MANHATTAN",
    "tech_contacts" : [ "ARIN49-ARIN" ],
    "abuse_contacts" : [ "ARIN49-ARIN" ],
    "date_created" : "2011-07-06",
    "date_updated" : "2022-01-10",
    "source" : "https://rdap.arin.net/registry/autnum/40397"
  } ],
  "organization" : {
    "handle" : "FM-1",
    "name" : "First Manhattan Co.",
    "address" : [ "399 Park Ave", "27th Floor", "New York", "NY", "10022", "US" ],
    "street" : "Park Ave",
    "city" : "New York",
    "state" : "NY",
    "zip_code" : "10022",
    "country" : [ "US" ],
    "date_created" : "2011-06-17",
    "date_updated" : "2022-01-07",
    "source" : "https://rdap.arin.net/registry/entity/FM-1",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ARIN49-ARIN",
    "name" : "arin",
    "email" : [ "arin@firstmanhattan.com" ],
    "phone" : [ "+1-212-756-3300" ],
    "source" : "https://rdap.arin.net/registry/entity/ARIN49-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ARIN49-ARIN",
    "name" : "arin",
    "email" : [ "arin@firstmanhattan.com" ],
    "phone" : [ "+1-212-756-3300" ],
    "source" : "https://rdap.arin.net/registry/entity/ARIN49-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS1239	Cogent Communications, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS174	Cogent Communications, LLC	US

Frequently Asked Questions

What is ASN AS40397?

ASN AS40397 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS40397?

AS40397 is listed under First Manhattan Co..

What do peers, upstreams, and downstreams mean?

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 included here?

WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.