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AS18729 Shawmut Design & Construction

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

Shawmut Design & Construction shawmut.com

US 2 Routes

AS Data

AS18729

AS18729 – Shawmut Design & Construction

AS Number	18729
AS Name	SHAWMUT
Organization	Shawmut Design & Construction(sdc-68)
Country	US
Website	shawmut.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2000-10-03

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
50.236.28.0/24	AS18729	Shawmut Design & Construction	Comcast Cable Communications, LLC	256
64.214.98.0/24	AS18729	Shawmut Design & Construction	Level 3 Parent, LLC	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:       18729
ASName:         SHAWMUT
ASHandle:       AS18729
RegDate:        2000-10-03
Updated:        2012-03-20    
Ref:            https://rdap.arin.net/registry/autnum/18729


OrgName:        Shawmut Design & Construction
OrgId:          SDC-68
Address:        560 Harrison Avenue
City:           Boston
StateProv:      MA
PostalCode:     02118
Country:        US
RegDate:        2000-10-03
Updated:        2012-10-10
Ref:            https://rdap.arin.net/registry/entity/SDC-68


OrgTechHandle: CR448-ARIN
OrgTechName:   Ryan, Chris 
OrgTechPhone:  +1-617-622-7000 
OrgTechEmail:  cryan@shawmut.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CR448-ARIN

OrgAbuseHandle: CR448-ARIN
OrgAbuseName:   Ryan, Chris 
OrgAbusePhone:  +1-617-622-7000 
OrgAbuseEmail:  cryan@shawmut.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CR448-ARIN

RTechHandle: CR448-ARIN
RTechName:   Ryan, Chris 
RTechPhone:  +1-617-622-7000 
RTechEmail:  cryan@shawmut.com
RTechRef:    https://rdap.arin.net/registry/entity/CR448-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
AS46887	Crown Castle Fiber LLC	US
AS7015	Comcast Cable Communications, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS7015	Comcast Cable Communications, LLC	US

Frequently Asked Questions

What is ASN AS18729?

ASN AS18729 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS18729?

AS18729 is listed under Shawmut Design & Construction.

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.