Autonomous system
AS4181 TDS-AS
Residential RIPE
Summary
TDS Telecom
isp legacy
TDS-AS is TDS Telecom, the wireline broadband and telephone arm of Telephone and Data Systems, Inc., headquartered in Madison, Wisconsin.
What it's used for
- Residential and small-business internet access across TDS's service territory, which spans rural and suburban communities in dozens of US states.
- TDS operates as an incumbent local exchange carrier in many of its markets and has been expanding fiber-to-the-home alongside its legacy copper and cable footprint.
Notable
- This is eyeball space. Addresses here overwhelmingly map to home broadband subscribers, so geolocation tends to resolve to small towns and suburbs rather than data centers.
- The allocation is large (over 1.7 million addresses), consistent with a multi-state consumer ISP that needs a public address per subscriber line.
Interesting
- TDS is one of the larger US broadband providers that most people outside its footprint have never heard of, because it grew by serving markets the big national carriers skipped.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 10 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.64 |
| Seattle Internet Exchange | Seattle, United States | 206.81.80.178 |
| Coresite - Any2 West | Los Angeles, United States | 206.72.210.140 |
| Any2 California | Los Angeles, United States | 206.72.210.140 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.64 |
| New York International Internet Exchange | New York, United States | 198.32.160.146 |
| Digital Realty Atlanta Internet Exchange | Atlanta, United States | 206.126.110.28 |
| Midwest Internet Cooperative Exchange | Minneapolis, United States | 206.108.255.4 |
Transit providers
17 upstream, 42 downstream and 72 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 404 prefixes · 1.81M addresses IPv6 4 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 408 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS4181- Registry name
- TDS-AS
- Registrant
- TDS TELECOM
- Abuse contact
- abuse@tds.net
- Registered
- 1994-12-16
- Last changed
- 2019-07-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 18% valid · 96 valid, 6 with no ROA 437 RPKI-invalid
- ROAs
- 85 authorising AS4181
- ASPA
- 2 declared providers
- IRR
- 100% registered · 539 of 539 announcements
- Route objects
- 127 naming AS4181
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere