ASN AS19855 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS19855?

AS19855 is listed under Masergy Communications, Inc..

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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AS19855 Masergy Communications, Inc.

ASN Lookup Tool

Masergy Communications, Inc. masergy.com

US 102 Routes

AS Data

AS19855

AS19855 – Masergy Communications, Inc.

AS Number	19855
AS Name	MASERGY
Organization	Masergy Communications, Inc.(msrg)
Country	US
Website	masergy.com
Number of IPv4 Routes	97
Number of IPv6 Routes	5
ASN type	ISP
Registry	ARIN
Date Allocated	2001-02-21

ASN Intelligence API for production workflows

Use ASN data for AS19855 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.73.224.0/24	AS19855	Masergy Communications, Inc.	Blount International, Inc	256
64.47.252.0/24	AS19855	Masergy Communications, Inc.	Masergy Communications, Inc.	256
64.138.8.0/23	AS19855	Masergy Communications, Inc.	Masergy Communications, Inc.	512
65.96.128.0/18	AS19855	Masergy Communications, Inc.	Comcast Cable Communications, LLC	16384
64.47.164.0/24	AS19855	Masergy Communications, Inc.	Best, Best & Krieger LLP	256
64.47.84.0/22	AS19855	Masergy Communications, Inc.	Paragon Industries, Inc	1024
64.138.156.0/22	AS19855	Masergy Communications, Inc.	Comcast Business	1024
64.47.50.0/23	AS19855	Masergy Communications, Inc.	Masergy Communications, Inc.	512
64.47.62.0/23	AS19855	Masergy Communications, Inc.	Campagna Turano Bakery, Inc.	512
204.139.40.0/24	AS19855	Masergy Communications, Inc.	AAR Corp.	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:       19855
ASName:         MASERGY
ASHandle:       AS19855
RegDate:        2001-02-21
Updated:        2012-03-02    
Ref:            https://rdap.arin.net/registry/autnum/19855


OrgName:        Masergy Communications, Inc.
OrgId:          MSRG
Address:        2740 NORTH DALLAS PARKWAY
Address:        SUITE 260
City:           Plano
StateProv:      TX
PostalCode:     75093
Country:        US
RegDate:        
Updated:        2024-11-25
Comment:        http://www.masergy.com
Comment:        1-877-4MASERGY
Ref:            https://rdap.arin.net/registry/entity/MSRG


OrgTechHandle: ZM130-ARIN
OrgTechName:   Masergy Communications
OrgTechPhone:  +1-877-462-7374 
OrgTechEmail:  chq--masergy-tcif@comcast.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ZM130-ARIN

OrgNOCHandle: MASER-ARIN
OrgNOCName:   Masergy-NOC
OrgNOCPhone:  +1-877-462-7374 
OrgNOCEmail:  noc@masergy.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/MASER-ARIN

OrgAbuseHandle: MASER1-ARIN
OrgAbuseName:   Masergy-Abuse
OrgAbusePhone:  +1-866-885-5558 
OrgAbuseEmail:  abuse@masergy.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MASER1-ARIN

RTechHandle: ZM130-ARIN
RTechName:   Masergy Communications
RTechPhone:  +1-877-462-7374 
RTechEmail:  chq--masergy-tcif@comcast.com
RTechRef:    https://rdap.arin.net/registry/entity/ZM130-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" : "19855",
    "as_handle" : "AS19855",
    "as_name" : "MASERGY",
    "tech_contacts" : [ "ZM130-ARIN", "ZM130-ARIN" ],
    "abuse_contacts" : [ "MASER1-ARIN" ],
    "date_created" : "2001-02-21",
    "date_updated" : "2012-03-02",
    "source" : "https://rdap.arin.net/registry/autnum/19855"
  } ],
  "organization" : {
    "handle" : "MSRG",
    "name" : "Masergy Communications, Inc.",
    "address" : [ "2740 NORTH DALLAS PARKWAY", "SUITE 260", "Plano", "TX", "75093", "US" ],
    "street" : "North Dallas Parkway",
    "city" : "Plano",
    "state" : "TX",
    "zip_code" : "75093",
    "country" : [ "US" ],
    "date_updated" : "2024-11-25",
    "source" : "https://rdap.arin.net/registry/entity/MSRG",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ZM130-ARIN",
    "name" : "Masergy Communications",
    "email" : [ "chq--masergy-tcif@comcast.com" ],
    "phone" : [ "+1-877-462-7374" ],
    "source" : "https://rdap.arin.net/registry/entity/ZM130-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "MASER1-ARIN",
    "name" : "Masergy-Abuse",
    "email" : [ "abuse@masergy.com" ],
    "phone" : [ "+1-866-885-5558" ],
    "source" : "https://rdap.arin.net/registry/entity/MASER1-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS14514	Paul, Hastings, Janofsky & Walker LLP	US
AS7474	SingTel Optus Pty Ltd	AU
AS33491	Comcast Cable Communications, LLC	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3491	PCCW Global	US
AS16541	Erickson Living Management, LLC	US
AS33014	MARLIN LEASING CORPORATION	US
AS6939	Hurricane Electric LLC	US
AS33054	McCracken Financial Software	US
AS400084	CSRA State and Local Solutions LLC	US

Upstreams

AS Number	Description	Country
AS7474	SingTel Optus Pty Ltd	AU
AS33491	Comcast Cable Communications, LLC	US
AS12956	TELXIUS Cable	ES
AS6939	Hurricane Electric LLC	US
AS3491	PCCW Global HK Limited	HK
AS7473	Singapore Telecommunications SINGTEL Internet Exchange	SG
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS7922	Comcast Cable Communications, LLC	US

Downstreams

AS Number	Description	Country
AS14514	Paul, Hastings, Janofsky & Walker LLP	US
AS20427	American Association of Airport Executives	US
AS16541	Erickson Living Management, LLC	US
AS33014	MARLIN LEASING CORPORATION	US
AS892	Emergent Biosolutions	US
AS394301	Dexcom, INC.	US
AS399085	Masergy Communications, Inc.	US
AS33054	McCracken Financial Software	US
AS394944	CCC Intelligent Solutions Inc.	US
AS400084	CSRA State and Local Solutions LLC	US