AS61231 — Neos-Networks Neos Networks Limited

AS61231 announces 14 IPv4 prefixes covering 33,024 addresses and 1 IPv6 prefixes.

About this network

NEOS-NETWORKS is operated by Neos Networks Limited.

What it's used for

• The address space carries business connectivity traffic, with netnames NeosNetworks and UK-NEOSNETWORKS-20121231 identifying the operator's own infrastructure.
• 33024 IPv4 addresses are announced across 14 prefixes, peering with 115 neighbours, a ratio consistent with a national business network provider rather than a transit hub.
• Traffic consists of high-capacity fibre connections for Critical National Infrastructure and enterprise clients, reflecting the operator's role as a B2B telecoms provider.

Notable

• Registrants for the majority of prefixes are Neos Networks Limited, while several blocks in the 155.136.0.0/16 range retain the netname UK-NATWEST-155-136-0-0-16, indicating legacy address space from a previous owner.
• The operator rebranded from SSE Enterprise Telecoms to Neos Networks as part of a business transformation that began with a 2019 investment by Infracapital.
• The inventory is dominated by the 161.12.0.0/16 block, subdivided into multiple /22 and /23 prefixes, alongside smaller allocations in 155.136.0.0/16 and 185.14.0.0/16.

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

Announced prefixes

• 155.136.198.0/23
• 155.136.224.0/22
• 155.136.230.0/23
• 155.136.232.0/23
• 161.12.0.0/22
• 161.12.4.0/23
• 161.12.20.0/22
• 161.12.24.0/24
• 161.12.26.0/23
• 161.12.28.0/22
• 161.12.32.0/19
• 161.12.64.0/18
• 185.14.144.0/22
• 194.169.150.0/23
• 2a02:f9c0::/29

Upstream networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS34549 meerfarbig GmbH & Co. KG
• AS50304 Blix Solutions AS
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS213241 TECHIT.BE SRL
• AS48185 team.blue NV
• AS37721 Virtual Technologies & Solutions
• AS50300 CustodianDC Limited
• AS33891 Core-Backbone GmbH
• AS37100 SEACOM Limited
• AS3741 Dimension Data
• AS12552 GlobalConnect AB
• AS3216 PJSC "Vimpelcom"
• AS4657 StarHub Ltd
• AS12779 IT.Gate S.p.A.
• AS7575 Australian Academic and Research Network (AARNet)
• AS48362 Stadtwerke Feldkirch
• AS25091 IP-Max SA
• AS9002 RETN Limited

Downstream networks

• AS211167 IT Farm Limited
• AS60593 Network Rail Infrastructure Limited
• AS25470 Neos Networks Limited
• AS204562 JAVELIN BROADBAND LIMITED
• AS44314 ITsynergy Limited
• AS213646 Monkey Tree Hosting Limited
• AS202630 Sequential Networks Limited
• AS203171 Chi Technology Ltd
• AS204103 Comms West Limited
• AS401234 Northeastern University
• AS211678 Michaelston y Fedw Internet CIC
• AS215742 Duplia Ltd
• AS38808 NIGSUN LIMITED - IP SERVICES
• AS215047 DSV Communications Limited
• AS209738 CURVE INFORMATION TECHNOLOGY LIMITED
• AS209198 Offshore Renewable Energy Catapult
• AS208307 SECONDMIND LIMITED
• AS210005 Easysoft Ltd
• AS209931 Virair Limited
• AS25585 Kencomp Internet Ltd
• AS49758 Lloyds Banking Group PLC
• AS35350 UCB Pharma S.A.
• AS8435 Lloyds Banking Group PLC
• AS212880 Rydal Communications Ltd
• AS41484 NYnet Ltd

Adjacent networks

• AS214073 Heart Internet limited
• AS174 Cogent Communications, LLC
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS6939 Hurricane Electric LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS211167 IT Farm Limited
• AS38808 NIGSUN LIMITED - IP SERVICES
• AS60593 Network Rail Infrastructure Limited
• AS25470 Neos Networks Limited
• AS204562 JAVELIN BROADBAND LIMITED
• AS44314 ITsynergy Limited
• AS50304 Blix Solutions AS
• AS50300 CustodianDC Limited
• AS7575 Australian Academic and Research Network (AARNet)
• AS213646 Monkey Tree Hosting Limited
• AS202630 Sequential Networks Limited
• AS203171 Chi Technology Ltd
• AS37721 Virtual Technologies & Solutions
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS204103 Comms West Limited
• AS401234 Northeastern University
• AS3741 Dimension Data
• AS37100 SEACOM Limited
• AS8435 Lloyds Banking Group PLC

Routing security

• RPKI: 0 valid, 0 invalid and 9 not-found announcements; 1 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 12 route objects.
• Listed in as-sets: AS-MANDA-LINX-PEERS-V4, AS-MANDA-LINX-PEERS-V6, AS-SSET, AS61231:AS-NEOS.

Internet exchanges

• LINX LON1 — London, United Kingdom