subnet.im

AS33891Core-Backbone GmbH

GermanyRegistryRIPE NCCTypeCarrier

As of 26th September 2026, AS33891 (Core-Backbone GmbH), a transit carrier registered in Germany with RIPE NCC, does not originate any prefixes visible to our route collectors. It is seen behind 57 upstream networks, most often AS24940 (Hetzner Online GmbH) and AS6667 (Elisa Oyj), and in front of 1,233 downstream networks.

At a glance

IPv4 prefixes

0

IPv6 prefixes

0

IPv4 addresses

Unknown

IPv6 /64s

Unknown

Upstream graph

The networks AS33891 is seen behind, one and two hops out, drawn from real AS paths.

AS33891Toward the internet core
Upstream graph for AS33891: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33891Core-Backbone GmbHThis networkAS1299Arelion (fka. Tel…AS3257GTT Communication…AS6667Elisa OyjAS24940Hetzner Online Gm…AS32590Valve CorporationAS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS398465Rackdog LLCAS3356Lumen (Level 3)AS2914NTT America, Inc.AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS33891 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

3,837

adjacent networks

Upstreams
571%
Peers
2,54766%
Downstreams
1,23332%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 57.

Upstreams of AS33891
NetworkCountryRelationshipPathsVantage pts
AS24940Hetzner Online GmbHDEPeer86,2142
AS6667Elisa OyjFIPeer31,5584
AS32590Valve CorporationUSPeer26,8796
AS1299Arelion (fka. Telia Carrier)SEPeer25,27891
AS3257GTT Communications Inc.USPeer22,78228
AS3356Lumen (Level 3)USPeer22,62174
AS18106Viewqwest Pte LtdSGPeer22,5184
AS14537Continent 8 LLCUSPeer15,1524
AS13030Init7 (Switzerland) Ltd.CHPeer15,1354
AS37271Workonline Communications(Pty) LtdZAPeer12,9092

Prefixes

The largest blocks AS33891 originates, widest first.

AS33891 does not originate any prefix visible from our collectors. Transit-only and unused ASNs both look like this.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.