AS58273 — B4RN-AS Broadband for the Rural North Limited.

AS58273 announces 15 IPv4 prefixes covering 23,296 addresses and 18 IPv6 prefixes.

About this network

B4RN-AS is operated by Broadband for the Rural North Limited.

What it's used for

• The address space carries residential and business fibre broadband, evidenced by reverse DNS entries pointing to reverse.b4rn.org.uk and netnames such as UK-B4RN-24082023 and Bolton-By-Bowland-Pool-1.
• The AS announces 23,296 IPv4 addresses across 15 prefixes and 22 IPv6 prefixes, while maintaining 90 observed neighbours; this ratio of address inventory to peering relationships indicates an access network rather than a transit provider.
• Traffic from this AS consists of subscriber eyeballs and local business endpoints, as B4RN is a community-led ISP delivering symmetrical gigabit full-fibre broadband to rural areas in northern England.

Notable

• Registrants for the majority of prefixes align with the announcer, listing B4RN Ripe Admin; Broadband for the Rural North Limited, though some blocks show different registrants such as Interfire Ltd and Abuse-C Role.
• The address inventory is finely subdivided into multiple /20, /21, and /22 blocks, reflecting a site-by-site or regional segmentation of the corporate estate.

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

Announced prefixes

• 5.83.8.0/21
• 88.97.112.0/20
• 88.97.128.0/20
• 88.97.144.0/21
• 88.97.152.0/22
• 88.97.156.0/24
• 148.252.16.0/20
• 185.89.32.0/22
• 185.159.91.0/24
• 185.201.32.0/22
• 185.217.156.0/23
• 185.243.104.0/22
• 194.31.184.0/23
• 194.31.187.0/24
• 194.113.44.0/22
• 2a01:6240::/48
• 2a01:6240:19::/48
• 2a01:6240:22::/47
• 2a01:6240:24::/48
• 2a01:6240:26::/48
• 2a01:6240:30::/48
• 2a01:6240:80::/48
• 2a01:6241:8000::/34
• 2a01:6242::/34
• 2a01:6242:8000::/34
• 2a01:6243::/34
• 2a01:6244::/34
• 2a01:6244:8000::/34
• 2a01:6245::/34
• 2a01:6246::/34
• 2a01:6247::/34
• 2a01:6247:8000::/34
• 2a10:cb80::/29

Upstream networks

• AS6461 Zayo Bandwidth
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS50304 Blix Solutions AS
• AS37721 Virtual Technologies & Solutions
• AS48185 team.blue NV
• AS174 Cogent Communications, LLC
• AS24482 SG.GS
• AS50300 CustodianDC Limited
• AS17639 Converge ICT Solutions Inc.
• AS20562 Broadband Hosting B.V.
• AS12779 IT.Gate S.p.A.
• AS37100 SEACOM Limited
• AS29075 IELO-LIAZO SERVICES SAS
• AS12552 GlobalConnect AB
• AS3741 Dimension Data
• AS48362 Stadtwerke Feldkirch
• AS31500 Global Network Management Inc
• AS33891 Core-Backbone GmbH
• AS3216 PJSC "Vimpelcom"
• AS4657 StarHub Ltd
• AS9002 RETN Limited
• AS13030 Init7 (Switzerland) Ltd.

Downstream networks

• AS213513 Computle Limited

Adjacent networks

• AS6461 Zayo Bandwidth
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS50304 Blix Solutions AS
• AS48185 team.blue NV
• AS37721 Virtual Technologies & Solutions
• AS174 Cogent Communications, LLC
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS50300 CustodianDC Limited
• AS29075 IELO-LIAZO SERVICES SAS
• AS37100 SEACOM Limited
• AS12552 GlobalConnect AB
• AS3741 Dimension Data
• AS20562 Broadband Hosting B.V.
• AS12779 IT.Gate S.p.A.
• AS48362 Stadtwerke Feldkirch
• AS31500 Global Network Management Inc
• AS33891 Core-Backbone GmbH
• AS4657 StarHub Ltd
• AS3216 PJSC "Vimpelcom"
• AS213513 Computle Limited
• AS9002 RETN Limited
• AS13030 Init7 (Switzerland) Ltd.

Routing security

• RPKI: 69 valid, 0 invalid and 0 not-found announcements; 16 ROAs.
• ASPA: none published.
• IRR: 94% of announcements registered; 83 route objects.
• Listed in as-sets: AS-B4RN, AS-GBXSCUST-FULL, AS-MANDA-LINX-PEERS-V4, AS-MANDA-LINX-PEERS-V6.

Internet exchanges

• LINX LON1 — London, United Kingdom
• LINX Manchester — Manchester, United Kingdom
• Leeds Internet Exchange — Leeds, United Kingdom
• LINX Scotland — Scotland, United Kingdom