AS19855 — MASERGY

AS19855 announces 53 IPv4 prefixes covering 157,440 addresses and 5 IPv6 prefixes.

About this network

The AS handle MASERGY is held by Masergy Communications, Inc.

What it's used for

• The address space carries managed enterprise networking infrastructure, evidenced by netnames like MASERGY-BLK1 and MSGY-BLK2 and reverse DNS entries pointing to masergy.com.
• With 157,440 IPv4 addresses announced across 117 prefixes and 25 observed neighbours, the ratio indicates a business-focused network providing SD-WAN and cloud connectivity services rather than a large-scale residential access provider.

Notable

• Registrants for the majority of prefixes align with the announcer, listing Masergy Communications, Inc., though two large /18 blocks are registered to Comcast Cable Communications, LLC.
• Masergy was acquired by Comcast Business in 2021, explaining the presence of Comcast-registered prefixes within the autonomous system.
• The inventory includes a mix of large /18 and /19 blocks alongside numerous smaller /21 and /22 prefixes, reflecting a segmented corporate estate.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 45.45.151.0/24
• 64.47.0.0/21
• 64.47.8.0/22
• 64.47.12.0/23
• 64.47.14.0/24
• 64.47.16.0/21
• 64.47.24.0/24
• 64.47.26.0/23
• 64.47.28.0/22
• 64.47.32.0/24
• 64.47.34.0/23
• 64.47.36.0/22
• 64.47.40.0/21
• 64.47.48.0/20
• 64.47.64.0/18
• 64.47.128.0/19
• 64.47.160.0/21
• 64.47.169.0/24
• 64.47.170.0/23
• 64.47.173.0/24
• 64.47.174.0/23
• 64.47.176.0/20
• 64.47.192.0/22
• 64.47.196.0/23
• 64.47.199.0/24
• 64.47.200.0/21
• 64.47.208.0/21
• 64.47.216.0/22
• 64.47.220.0/23
• 64.47.222.0/24
• 64.47.224.0/19
• 64.138.0.0/17
• 64.138.128.0/21
• 64.138.136.0/22
• 64.138.140.0/23
• 64.138.142.0/24
• 64.138.144.0/20
• 64.138.160.0/19
• 65.96.0.0/18
• 65.96.128.0/18
• 74.116.49.0/24
• 80.241.64.0/20
• 93.187.16.0/21
• 94.199.128.0/21
• 140.242.146.0/23
• 169.143.243.0/24
• 185.60.28.0/22
• 192.131.149.0/24
• 192.197.247.0/24
• 198.73.224.0/24
• 204.139.40.0/24
• 204.139.45.0/24
• 204.139.49.0/24
• 2400:7160:2000::/44
• 2400:7160:2020::/44
• 2402:2100::/32
• 2607:fa70::/32
• 2a03:6580::/32

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS7922 Comcast Cable Communications, LLC
• AS3491 PCCW Global (HK) Ltd.
• AS7473 Singapore Telecommunications Ltd
• AS12956 TELEFONICA GLOBAL SOLUTIONS SL
• AS7474 SingTel Optus Pty Ltd
• AS33491 Comcast Cable Communications, LLC
• AS174 Cogent Communications, LLC

Downstream networks

• AS40399 Masergy Cloud Communications, Inc.
• AS12222 Akamai Technologies, Inc.
• AS26428 The Talbots, Inc.
• AS15027 Foley Hoag LLP
• AS15126 Suzuki Marine USA, LLC
• AS394301 Dexcom, INC.
• AS14514 Paul, Hastings, Janofsky & Walker LLP
• AS20340 CallTower, Inc.
• AS33014 MARLIN LEASING CORPORATION
• AS13860 Lincoln National Corporation
• AS22775 Moore Capital Management
• AS33054 McCracken Financial Software
• AS16541 Erickson Living Management, LLC
• AS20427 American Association of Airport Executives
• AS23406 CHOATE, HALL & STEWART, LLP
• AS11199 showNets LLC

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS7922 Comcast Cable Communications, LLC
• AS3491 PCCW Global (HK) Ltd.
• AS7473 Singapore Telecommunications Ltd
• AS40399 Masergy Cloud Communications, Inc.
• AS7474 SingTel Optus Pty Ltd
• AS12222 Akamai Technologies, Inc.
• AS12956 TELEFONICA GLOBAL SOLUTIONS SL
• AS26428 The Talbots, Inc.
• AS33491 Comcast Cable Communications, LLC
• AS15027 Foley Hoag LLP
• AS174 Cogent Communications, LLC
• AS394301 Dexcom, INC.
• AS15126 Suzuki Marine USA, LLC
• AS14514 Paul, Hastings, Janofsky & Walker LLP
• AS20340 CallTower, Inc.
• AS33014 MARLIN LEASING CORPORATION
• AS13860 Lincoln National Corporation
• AS22775 Moore Capital Management
• AS33054 McCracken Financial Software
• AS16541 Erickson Living Management, LLC
• AS20427 American Association of Airport Executives
• AS23406 CHOATE, HALL & STEWART, LLP
• AS11199 showNets LLC