Autonomous system
AS15348 TUCOWS
Unclassified ARIN
Summary
Tucows
hosting business infrastructure
Four contact roles per block, listed in a different order on different blocks.
What it's used for
- A domain registrar and internet services company. Twenty-one IPv4 prefixes and one IPv6
/48announced from Canada, thirty-seven thousand addresses, across two observed BGP neighbours.
Notable
- Most registrant fields name the company plus a network operations centre, an abuse and security team and an operations team, four contacts on one record.
- The order of those roles is not the same on every block: some list abuse second, others third, so the records were written at different times by different hands.
- Most blocks share one netname; the second family uses a variant that drops the final letter of the company name and pads its counter with a zero.
- Sixteen of the routes fall inside one large range, and the remaining five tile a single aligned range that one announcement could carry.
- Eighteen addresses were queried for reverse DNS and none returned a name.
Interesting
- Four named contacts is the most thorough registration in this range. Whoever files a complaint here reaches a team that exists, which is rarer than it should be.
- Publishing nothing in reverse is a surprise for a company whose business includes hosted mail, since receivers score unnamed addresses more harshly. It suggests the mail leaves by other addresses.
- The dropped letter in the second netname is permanent. It has been quoted in every lookup since.
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 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Toronto Internet Exchange | Toronto, Canada | 206.108.34.120 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 21 prefixes · 37.38K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CA | Canada | 22 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS15348- Registry name
- TUCOWS
- Registrant
- Tucows.com Co.
- Abuse contact
- arin-abuse@tucows.com
- Registered
- 2000-04-20
- Last changed
- 2013-01-03
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 100% valid · 11 valid, 0 with no ROA
- ROAs
- 5 authorising AS15348
- ASPA
- no ASPA record
- IRR
- 100% registered · 11 of 11 announcements
- Route objects
- 31 naming AS15348
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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