Autonomous system
AS6735 SDTNET
Residential RIPE Cable/DSL/ISP
Summary
TNG Stadtnetz (sdt.net)
isp eyeball legacy
Registered to TNG Stadtnetz GmbH of Kiel, this AS carries the network of sdt.net, the Aalen-based regional provider in Baden-Württemberg that TNG acquired. The handle is SDTNET and the reverse DNS across the space is still *.sdt.net.
What it's used for
- Regional broadband in Germany — VDSL and fibre-to-the-home — sold to households and to businesses in the operator's footprint.
- It also routes provider-independent space on behalf of at least one customer, so a few addresses here belong to a downstream organisation rather than to the ISP.
Notable
- Two operators, one AS: the number and the customers moved to TNG, while the IPv4 blocks it announces remain registered to a related company at the original Aalen operation. The brand visible in DNS (
sdt.net) is the one being retired, not the one that owns the AS. - An eyeball network. Addresses here are homes and local businesses on a German access network.
Interesting
- TNG bought sdt.net outright and then merged it in, extending a Kiel fibre operator's reach into Baden-Württemberg — the opposite end of the country. The two brands ran side by side during the transition, which is why the naming in the registry and the naming in DNS still disagree.
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 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| KleyReX Internet Exchange | Frankfurt, Germany | 193.189.82.74 |
| Stuttgarter Internet Exchange | Stuttgart, Germany | 193.138.31.4 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 33.02K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| DE | Germany | 4 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS6735- Registry name
- SDTNET
- Registrant
- TNG Stadtnetz GmbH
- Abuse contact
- abuse@tng.de
- Registered
- 2002-09-23
- Last changed
- 2024-11-18
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- TNG Stadtnetz GmbH (ex sdt.net)
- Also known as
- TNG
- Network type
- Cable/DSL/ISP
- Scope
- Europe
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
RIPE::AS-SDT- Present at
- 2 exchanges
- Facilities
- 3 facilities
- Website
- http://www.sdt.net
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 4 valid, 0 with no ROA
- ROAs
- 7 authorising AS6735
- ASPA
- no ASPA record
- IRR
- 100% registered · 4 of 4 announcements
- Route objects
- 7 naming AS6735
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: 447 networks and 1,852 prefixes, as published 2026-10-27. 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