AS31027 — GlobalConnect-AS31027 GlobalConnect A/S

AS31027 announces 117 IPv4 prefixes covering 381,184 addresses and 10 IPv6 prefixes.

About this network

GLOBALCONNECT-AS31027 is operated by GlobalConnect A/S.

What it's used for

• The address space carries GlobalConnect's own network infrastructure, evidenced by netnames such as DK-GLOBALCONNECT-20080701 and registrants including GlobalConnect IP Network Team and GlobalConnect A/S.
• With 381440 IPv4 addresses announced across 123 prefixes and 1076 observed neighbours, the high neighbour-to-address ratio indicates a transit and network service provider role rather than a pure access network.

Notable

• Registrants consistently align with the announcer, listing GlobalConnect IP Network Team, GlobalConnect A/S, and GlobalConnect Abuse across the largest prefixes.
• The operator has been known by several names including Nianet and Zen Systems, reflecting its history as a major Danish telecommunications provider.
• The inventory includes a mix of large /16 and /17 blocks alongside numerous smaller /19 and /20 prefixes, suggesting a diverse and segmented address estate.

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

Announced prefixes

• 5.56.144.0/20
• 5.83.24.0/21
• 5.179.80.0/20
• 37.25.64.0/21
• 37.28.136.0/21
• 37.49.128.0/20
• 37.140.219.0/24
• 45.67.92.0/22
• 46.32.128.0/20
• 62.116.192.0/19
• 62.122.160.0/21
• 62.164.128.0/23
• 77.233.224.0/19
• 78.31.32.0/21
• 78.111.160.0/20
• 78.153.160.0/19
• 80.88.128.0/20
• 80.243.112.0/20
• 82.192.160.0/19
• 83.136.88.0/21
• 83.151.128.0/18
• 85.202.64.0/20
• 87.116.0.0/18
• 88.212.64.0/18
• 89.221.160.0/20
• 91.143.112.0/20
• 91.198.144.0/24
• 91.199.217.0/24
• 91.209.156.0/24
• 91.209.166.0/24
• 91.212.129.0/24
• 91.224.174.0/23
• 91.230.68.0/22
• 91.231.147.0/24
• 91.233.142.0/23
• 91.235.139.0/24
• 91.236.123.0/24
• 91.238.206.0/24
• 91.240.185.0/24
• 91.240.186.0/23
• 91.240.189.0/24
• 92.43.72.0/22
• 92.62.192.0/20
• 93.90.0.0/20
• 93.157.204.0/24
• 93.176.64.0/18
• 94.18.0.0/16
• 109.202.128.0/19
• 130.185.128.0/20
• 134.65.172.0/24
• 152.115.0.0/16
• 176.67.184.0/21
• 176.222.232.0/21
• 178.20.222.0/24
• 185.20.240.0/22
• 185.27.204.0/22
• 185.29.168.0/22
• 185.31.4.0/22
• 185.34.12.0/22
• 185.34.132.0/22
• 185.67.128.0/22
• 185.72.140.0/23
• 185.73.72.0/24
• 185.73.74.0/24
• 185.92.240.0/22
• 185.93.84.0/24
• 185.93.87.0/24
• 185.125.80.0/22
• 185.126.108.0/22
• 185.163.196.0/24
• 185.199.236.0/22
• 185.200.8.0/22
• 185.203.233.0/24
• 185.212.208.0/22
• 185.216.156.0/22
• 185.218.83.0/24
• 185.221.28.0/22
• 185.253.84.0/23
• 185.253.86.0/24
• 188.120.64.0/19
• 192.66.60.0/23
• 192.66.63.0/24
• 193.3.132.0/24
• 193.3.252.0/23
• 193.41.156.0/24
• 193.47.81.0/24
• 193.53.85.0/24
• 193.104.246.0/24
• 193.105.116.0/24
• 193.105.149.0/24
• 193.110.84.0/24
• 193.150.84.0/22
• 193.162.5.0/24
• 193.163.222.0/24
• 193.182.166.0/24
• 193.186.35.0/24
• 193.200.204.0/24
• 193.242.107.0/24
• 194.50.57.0/24
• 194.88.5.0/24

and 27 more.

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS1299 Arelion Sweden AB
• AS6797 GlobalConnect AB
• AS12552 GlobalConnect AB
• AS6939 Hurricane Electric LLC
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS9002 RETN Limited
• AS50304 Blix Solutions AS
• AS4637 Telstra Global
• AS3303 Swisscom (Schweiz) AG

Downstream networks

• AS2116 GLOBALCONNECT AS
• AS58282 Statens IT
• AS21060 Atea A/S
• AS47292 Sentia Denmark A/S
• AS42525 GlobalConnect A/S
• AS44869 FIBIA P/S
• AS215052 Din Server Group ApS
• AS44398 Itm8 A/S
• AS56496 TV 2 Danmark A/S
• AS62121 Christian Ebsen ApS
• AS42236 DTU Science Park a/s
• AS202914 Adeo Datacenter ApS
• AS216230 INFOWISE SERVICES ApS
• AS31590 Rackhosting.com ApS
• AS198622 Adform A/S
• AS3240 Styrelsen for it og laering
• AS210939 Procopa IT ApS
• AS200145 Aarhus Kommune
• AS42876 Unit IT A/S
• AS206082 Danish Crown A/S
• AS60111 ASOM-Net Forening
• AS202377 GlobalConnect A/S
• AS206920 Glentevejs Antennelaug
• AS208551 Aabenraa Kommune
• AS6834 KMD A/S

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS6797 GlobalConnect AB
• AS1299 Arelion Sweden AB
• AS12552 GlobalConnect AB
• AS6939 Hurricane Electric LLC
• AS2116 GLOBALCONNECT AS
• AS3333 Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
• AS44869 FIBIA P/S
• AS58282 Statens IT
• AS21060 Atea A/S
• AS47292 Sentia Denmark A/S
• AS42525 GlobalConnect A/S
• AS202914 Adeo Datacenter ApS
• AS199545 Stacket Group ApS
• AS215052 Din Server Group ApS
• AS44398 Itm8 A/S
• AS216230 INFOWISE SERVICES ApS
• AS56496 TV 2 Danmark A/S
• AS62121 Christian Ebsen ApS
• AS42236 DTU Science Park a/s
• AS198622 Adform A/S
• AS31590 Rackhosting.com ApS
• AS3240 Styrelsen for it og laering
• AS210939 Procopa IT ApS
• AS9002 RETN Limited

Routing security

• RPKI: 95 valid, 3 invalid and 51 not-found announcements; 111 ROAs.
• ASPA: none published.
• IRR: 89% of announcements registered; 212 route objects.
• Listed in as-sets: AS-DANSKETELECOM-IPV6, AS-FIBERBY-AMSIX-NO-RS, AS-GBLXEU, AS-GCNET, AS-GCNETDKV6, AS-OPENPEERINGPEERS, AS-RIS-RRC25, AS-TOMBII-STHIX, AS1200:AS-AMS-IX-PEERS, AS13030:AS-PEERS, AS15659:AS-NIX, AS216275:AS-TRANSITS, AS25151:AS-AMS-IX-PEERS, AS31027:AS-GCNET, AS31027:AS-GCNET-LEGACY, AS31027:AS-GCNETDK, AS31027:AS-GCNETFI, AS31027:AS-NIANET, AS3303:AS-SWCMPEERS, AS37271:AS-PEERS, AS61180:AS-PEERS-AMSIX.

Internet exchanges

• LINX LON1 — London, United Kingdom
• Berlin Commercial Internet Exchange — Berlin, Germany