Autonomous system
AS8821 TELEZUG WWZ Telekom AG TELEZUG
Residential RIPE Cable/DSL/ISP
Summary
WWZ Telekom AG
isp residential legacy
TELEZUG is WWZ Telekom AG, the telecom arm of Wasserwerke Zug — the municipal utility of the Swiss canton of Zug. It is one of Switzerland's larger cable-network operators and a partner in the Quickline association, selling Internet, TV and telephony to households and businesses in Zug and the neighbouring cantons under the long-running DataZug brand.
What it's used for
Residential and business access over a hybrid fibre-coax plant. The reverse DNS is unambiguous: sampled addresses in 82.136.64.0/18 resolve to pub082136064100.dh-hfc.datazug.ch — a dynamic-host (dh) pool on the HFC cable network, with the subscriber's address encoded in the hostname. Another sample lands on hsrp-50-dzpr210-211-zg.datazug.net, an HSRP router-redundancy interface on a Zug aggregation router. Subscriber pools plus the routers that serve them.
Notable
- Roughly 108k IPv4 addresses across only nine prefixes, plus IPv6 — a compact allocation for a network covering several cantons.
- 143 observed BGP neighbours is unusually high for an operator this size. That reflects Swiss peering density and the Quickline partner interconnects rather than a wholesale transit business; the address space itself is eyeball space.
Interesting
A water and electricity utility that became a serious ISP is a distinctly European pattern: the municipal works already owned the trenches, so laying coax — and later fibre — alongside the mains was the cheap move. The datazug.ch domain has carried Zug's Internet since the 1990s, and the AS has been visible in BGP since at least August 2000.
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 3 exchanges in 3 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.195.50 |
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.208.12 |
| SwissIX | Zurich, Switzerland | 91.206.52.119 |
Transit providers
26 upstream, 5 downstream and 50 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 2026-10-10, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 109K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CH | Switzerland | 12 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS8821- Registry name
- TELEZUG
- Registrant
- AS8821-MNT
- Abuse contact
- abuse@wwztelekom.ch
- Registered
- 1970-01-01
- Last changed
- 2019-04-04
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- WWZ Telekom
- Also known as
- AS-TELEZUG
- Network type
- Cable/DSL/ISP
- Scope
- Regional
- Traffic ratio
- Mostly Inbound
- Peering policy
- Selective
- IRR as-set
AS-TELEZUG- Present at
- 3 exchanges
- Facilities
- 5 facilities
- Website
- http://www.wwz.ch
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 · 12 valid, 0 with no ROA
- ROAs
- 13 authorising AS8821
- ASPA
- no ASPA record
- IRR
- 100% registered · 12 of 12 announcements
- Route objects
- 12 naming AS8821
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 1,775 prefixes, as published 2026-10-11. 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