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AS402650 Crescent Biopharma, Inc.

Q: Why is WHOIS data shown for an ASN?

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

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Crescent Biopharma, Inc. crescentbiopharma.com

US 0 Routes

AS Data

AS402650

AS402650 – Crescent Biopharma, Inc.

AS Number	402650
AS Name	CBIO-AS1
Organization	Crescent Biopharma, Inc. (cb-1545)
Country	US
Website	crescentbiopharma.com
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	2026-06-17

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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:       402650
ASName:         CBIO-AS1
ASHandle:       AS402650
RegDate:        2026-06-17
Updated:        2026-06-17
Ref:            https://rdap.arin.net/registry/autnum/402650


OrgName:        Crescent Biopharma, Inc.
OrgId:          CB-1545
Address:        300 5TH AVE STE 1010
City:           Waltham
StateProv:      MA
PostalCode:     02451
Country:        US
RegDate:        2025-10-09
Updated:        2026-01-27
Ref:            https://rdap.arin.net/registry/entity/CB-1545


OrgRoutingHandle: ITOPS12-ARIN
OrgRoutingName:   IT Ops
OrgRoutingPhone:  +1-508-439-0638 
OrgRoutingEmail:  steven.rizkalla@crescentbiopharma.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ITOPS12-ARIN

OrgDNSHandle: ITOPS12-ARIN
OrgDNSName:   IT Ops
OrgDNSPhone:  +1-508-439-0638 
OrgDNSEmail:  steven.rizkalla@crescentbiopharma.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/ITOPS12-ARIN

OrgAbuseHandle: ITOPS12-ARIN
OrgAbuseName:   IT Ops
OrgAbusePhone:  +1-508-439-0638 
OrgAbuseEmail:  steven.rizkalla@crescentbiopharma.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ITOPS12-ARIN

OrgNOCHandle: ITOPS12-ARIN
OrgNOCName:   IT Ops
OrgNOCPhone:  +1-508-439-0638 
OrgNOCEmail:  steven.rizkalla@crescentbiopharma.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ITOPS12-ARIN

OrgTechHandle: ITOPS12-ARIN
OrgTechName:   IT Ops
OrgTechPhone:  +1-508-439-0638 
OrgTechEmail:  steven.rizkalla@crescentbiopharma.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ITOPS12-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" : "402650",
    "as_handle" : "AS402650",
    "as_name" : "CBIO-AS1",
    "admin_contacts" : [ "ITOPS12-ARIN" ],
    "tech_contacts" : [ "ITOPS12-ARIN", "ITOPS12-ARIN" ],
    "abuse_contacts" : [ "ITOPS12-ARIN" ],
    "date_created" : "2026-06-17",
    "date_updated" : "2026-06-17",
    "source" : "https://rdap.arin.net/registry/autnum/402650"
  } ],
  "organization" : {
    "handle" : "CB-1545",
    "name" : "Crescent Biopharma, Inc.",
    "address" : [ "300 5TH AVE STE 1010", "Waltham", "MA", "02451", "US" ],
    "street" : "5th Ave",
    "city" : "Waltham",
    "state" : "MA",
    "zip_code" : "02451",
    "country" : [ "US" ],
    "date_created" : "2025-10-09",
    "date_updated" : "2026-01-27",
    "source" : "https://rdap.arin.net/registry/entity/CB-1545",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "ITOPS12-ARIN",
    "name" : "IT Ops",
    "email" : [ "steven.rizkalla@crescentbiopharma.com" ],
    "phone" : [ "+1-508-439-0638" ],
    "source" : "https://rdap.arin.net/registry/entity/ITOPS12-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "ITOPS12-ARIN",
    "name" : "IT Ops",
    "email" : [ "steven.rizkalla@crescentbiopharma.com" ],
    "phone" : [ "+1-508-439-0638" ],
    "source" : "https://rdap.arin.net/registry/entity/ITOPS12-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ITOPS12-ARIN",
    "name" : "IT Ops",
    "email" : [ "steven.rizkalla@crescentbiopharma.com" ],
    "phone" : [ "+1-508-439-0638" ],
    "source" : "https://rdap.arin.net/registry/entity/ITOPS12-ARIN"
  } ]
}

Frequently Asked Questions

What is ASN AS402650?

ASN AS402650 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS402650?

AS402650 is listed under Crescent Biopharma, Inc..

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.