AS3320

AS3320 is the core autonomous system of Deutsche Telekom AG (DTAG), one of Europe's largest carriers and a mixed eyeball-plus-backbone network. It serves a very large German residential and business broadband base while also operating as a transit-free backbone, and it is large enough to rank #17 in CAIDA AS Rank, with a customer cone of roughly 4,089 ASNs, ~116,118 prefixes, and ~320 million addresses, and an AS degree near 699 (about 612 customers, 87 peers, and zero providers). It announces on the order of 886–898 IPv4 prefixes of its own (and far more once customer space is counted), with an originated IPv4 footprint around 34 million addresses — among the largest in Europe. DTAG anchors a broad corporate family of related ASNs across the Deutsche Telekom group, including T-Systems (AS48951), Magyar Telekom (AS5483), Croatian Telecom (AS5391), Slovak Telekom (AS6855), OTEGlobe (AS12713), several T-Mobile mobile networks (AS8412 Austria, AS13036 Czechia, AS12912 Poland), Open Telekom Cloud (AS6878), and an IoT ASN (AS2773). For triage, a 3320 address is typically a German consumer or business broadband subscriber subject to dynamic reassignment; mobile traffic on the T-Mobile siblings carries an additional carrier-NAT shared-IP caveat.

Operator

Deutsche Telekom AG [Confirmed] — RIPE RDAP/WHOIS

Country / RIR

Germany, RIPE [Confirmed] — RIPE RDAP

Allocated

unknown precise date (legacy; aggregators show a 1970-01-01 placeholder) [Unknown] — RIPE RDAP

Org status

active — telekom.com

Security/abuse context

mixed eyeball + backbone + mobile (third-party mobile tags). German residential dynamic-IP reassignment caveat; mobile carrier-NAT shared-IP caveat on T-Mobile sibling space. No carrier-specific abuse listing of note as of 2026-06-04

Network & routing

Network type

mixed — large German/European ISP-eyeball + transit-free backbone [Confirmed] — PeeringDB (no upstream; supports Peer Lock) + CAIDA

Size

CAIDA AS Rank #17 globally — customer cone ~4,089 ASNs / ~116,118 prefixes / ~320,360,481 addresses; AS degree ~699 (~612 customers, ~87 peers, 0 providers); ~886–898 IPv4 originated (~25,172 announced incl. customers; ~34.2M addrs), ~131–186 IPv6 — asrank.caida.org/asns/3320, RIPEstat (2026-05)

Routing/peering

transit-free (0 upstreams); ~712 peers; supports Peer Lock — peeringdb.com/asn/3320

Notable usage

Deutsche Telekom's core German/European broadband + backbone network — telekom.com

Related ASNs

AS48951 (T-Systems), AS5483 (Magyar Telekom), AS5391 (Croatian Telecom), AS6855 (Slovak Telekom), AS12713 (OTEGlobe), AS8412 (T-Mobile AT), AS13036 (T-Mobile CZ), AS12912 (T-Mobile PL), AS6878 (Open Telekom Cloud), AS2773 (DTAG-IoT)

Analyst note

A 3320 IP is typically a German consumer/business broadband subscriber; also a major European transit backbone in AS paths. Mobile siblings add a carrier-NAT caveat.