Autonomous system
AS5391 T-HT Croatian Telecom Inc.
Residential RIPE
Summary
Hrvatski Telekom (T-HT)
isp eyeball residential legacy
T-HT is Hrvatski Telekom d.d., Croatia's incumbent telecommunications operator, headquartered in Zagreb and majority owned by Deutsche Telekom. This is its main network.
What it's used for
- Fixed broadband, mobile data, television, and voice for customers across Croatia, plus the corporate and business services the incumbent sells alongside them.
Notable
- A large eyeball network by Croatian standards, holding over a million IPv4 addresses. Most of them terminate on subscriber lines and phones rather than on servers.
- As the former state telecom monopoly, it inherited the country's copper and much of its core infrastructure, and it remains the network most Croatian internet users sit behind.
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 2 exchanges in 2 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.195.57 |
| Croatian Internet Exchange | Zagreb, Croatia | 185.1.87.87 |
Transit providers
8 upstream, 49 downstream and 73 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 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 69 prefixes · 1.12M addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| HR | Croatia | 70 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS5391- Registry name
- T-HT
- Registrant
- HPT-MNT
- Abuse contact
- abuse@t.ht.hr
- Registered
- 2002-05-10
- Last changed
- 2026-09-03
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 49 valid, 0 with no ROA
- ROAs
- 46 authorising AS5391
- ASPA
- no ASPA record
- IRR
- 100% registered · 49 of 49 announcements
- Route objects
- 113 naming AS5391
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: 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