AS13576 — SDNW-13576

Network type: residential

AS13576 announces 92 IPv4 prefixes covering 53,248 addresses and 3 IPv6 prefixes.

About this network

A cooperative carrying its member telcos' own blocks, with customer account numbers and the word unassigned published in reverse DNS.

What it's used for

• A regional carrier owned by independent telephone companies. 54,272 addresses across 109 IPv4 prefixes, three IPv6 prefixes, and fifty-eight observed BGP neighbours.

Notable

• Announced blocks are registered to several separate companies: a tribal telephone authority, two cooperatives, and a telecommunications company that also appears under a fibre trading name.
• The carrier's own registrant strings append two internal teams after semicolons, and the order of those two teams differs between records.
• Netnames such as SDN-66-115-192-0 name the parent range rather than the block being registered.
• One sampled name is cust.170935.sxflsdch38R.sdnet.net, another GE2-6.520.SXFLSDCH17R.cust.sdnet.net.
• One answers as 254.170.128.66.unassigned.sdncommunications.com.

Interesting

• A six-digit number in the customer label is an account or circuit reference, readable by anyone who asks the address what it is called. The other form gives a router port and a segment number instead, which is the same disclosure aimed at a different audience.
• Publishing unassigned as a label is honest and useful internally, and it tells a scanner exactly which addresses nobody is watching.
• Member-owned blocks announced under one number is the cooperative model in the routing table: ownership stays with each telephone company, reachability is pooled.

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

Announced prefixes

• 38.191.156.0/22
• 64.33.232.0/23
• 64.33.236.0/23
• 64.33.241.0/24
• 64.33.244.0/23
• 64.33.247.0/24
• 64.33.248.0/23
• 64.33.251.0/24
• 64.33.252.0/22
• 66.115.192.0/24
• 66.115.195.0/24
• 66.115.196.0/24
• 66.115.198.0/24
• 66.115.200.0/23
• 66.115.204.0/24
• 66.115.207.0/24
• 66.115.208.0/24
• 66.115.210.0/23
• 66.115.213.0/24
• 66.115.216.0/22
• 66.115.220.0/23
• 66.115.223.0/24
• 66.115.224.0/21
• 66.115.232.0/22
• 66.115.238.0/23
• 66.115.240.0/24
• 66.115.243.0/24
• 66.115.244.0/23
• 66.115.247.0/24
• 66.115.252.0/22
• 66.128.160.0/24
• 66.128.166.0/23
• 66.128.168.0/21
• 66.128.176.0/24
• 66.128.179.0/24
• 66.128.180.0/24
• 66.128.186.0/23
• 66.128.190.0/23
• 66.231.0.0/23
• 66.231.4.0/22
• 66.231.8.0/24
• 66.231.10.0/24
• 66.231.14.0/23
• 66.231.18.0/24
• 66.231.20.0/23
• 66.231.23.0/24
• 66.231.25.0/24
• 66.231.26.0/23
• 66.231.28.0/23
• 68.168.224.0/20
• 76.76.12.0/24
• 104.167.204.0/22
• 142.202.132.0/22
• 155.103.92.0/24
• 162.120.74.0/23
• 170.199.218.0/23
• 170.199.220.0/23
• 199.96.68.0/22
• 204.80.157.0/24
• 206.85.176.0/21
• 208.53.193.0/24
• 208.53.194.0/23
• 208.53.196.0/22
• 208.53.200.0/22
• 208.53.206.0/23
• 208.53.208.0/22
• 208.53.214.0/23
• 208.53.216.0/22
• 208.53.221.0/24
• 208.53.242.0/23
• 208.53.246.0/24
• 208.53.249.0/24
• 208.53.252.0/24
• 209.151.176.0/24
• 209.151.178.0/24
• 209.151.181.0/24
• 209.151.182.0/23
• 209.151.184.0/22
• 216.106.216.0/22
• 216.106.232.0/22
• 216.249.195.0/24
• 216.249.197.0/24
• 216.249.208.0/24
• 216.249.211.0/24
• 216.249.214.0/23
• 216.249.216.0/24
• 216.249.218.0/23
• 216.249.220.0/24
• 216.249.222.0/23
• 216.249.224.0/23
• 216.249.227.0/24
• 216.249.240.0/22
• 2602:ff5b::/36
• 2605:4b80:f000::/36
• 2607:fc00::/32

Upstream networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS3257 GTT Communications Inc.
• AS6461 Zayo Bandwidth

Downstream networks

• AS15204 INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.
• AS14955 Northern Valley Communications LLC
• AS6580 Golden West Telecommunications Coop., Inc.
• AS402159 Valley FiberCom
• AS401415 Alliance Communications
• AS63172 Venture Communications Cooperative
• AS399439 Mitchell Telecom
• AS18785 Santel Communications Cooperative, Inc.
• AS22223 MVTV Wireless
• AS6312 TrioTel Communications, Inc.
• AS27539 West River Telecommunications Cooperative
• AS30220 SWWC Service Cooperatives
• AS20014 West River Cooperative Telephone Company
• AS20300 Woodstock Telephone Company
• AS17203 Beresford Municipal Telephone Company
• AS397608 Hanson Communications, Inc.
• AS26023 Schwan's Shared Services, LLC.
• AS32231 Pathward, N.A.
• AS15157 NORTHWESTERN CORPORATION
• AS17378 TierPoint, LLC
• AS393821 Lismore Cooperative Telephone Company
• AS53309 Black Hills Corporation
• AS397745 Hanson Communications, Inc.
• AS395037 Sammons Financial Group, Inc.
• AS18870 Great Western Bank

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS15204 INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.
• AS1299 Arelion Sweden AB
• AS14955 Northern Valley Communications LLC
• AS6580 Golden West Telecommunications Coop., Inc.
• AS174 Cogent Communications, LLC
• AS402159 Valley FiberCom
• AS401415 Alliance Communications
• AS63172 Venture Communications Cooperative
• AS399439 Mitchell Telecom
• AS2914 NTT America, Inc.
• AS3257 GTT Communications Inc.
• AS18785 Santel Communications Cooperative, Inc.
• AS22223 MVTV Wireless
• AS6312 TrioTel Communications, Inc.
• AS27539 West River Telecommunications Cooperative
• AS30220 SWWC Service Cooperatives
• AS20014 West River Cooperative Telephone Company
• AS20300 Woodstock Telephone Company
• AS6461 Zayo Bandwidth
• AS17203 Beresford Municipal Telephone Company
• AS397608 Hanson Communications, Inc.
• AS26860 SWIFTEL COMMUNICATIONS
• AS17378 TierPoint, LLC
• AS26023 Schwan's Shared Services, LLC.

Internet exchanges

• Midwest Internet Cooperative Exchange — Minneapolis, United States
• Interconnection eXchange Denver — Denver, United States