subnet.im

AS51699NETZFABRIK

GermanyRegistryRIPE NCC

As of 10th November 2026, AS51699 (NETZFABRIK), a network registered in Germany with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 49,308th-largest of the 80,723 networks we see originating IPv4, and the 1,547th-largest of 2,329 in Germany. It is seen behind 13 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS34549 (meerfarbig GmbH & Co. KG). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

2

IPv6 prefixes

3

IPv4 addresses

512

IPv6 /64s

393k

Upstream graph

The networks AS51699 is seen behind, one and two hops out, drawn from real AS paths.

AS51699Toward the internet core
Upstream graph for AS51699: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS51699NETZFABRIKThis networkAS6939Hurricane Electri…AS7768Nuh Ahmet Firat t…AS12586GHOSTnet GmbHAS24482SG.GSAS34549meerfarbig GmbH &…AS20130Depaul UniversityAS132337AxclusiveAS3257GTT Communication…AS3320Deutsche Telekom …AS38623Metfone (Viettel …AS56662Marcin GondekAS213151Christian Elsen

Networks observed one and two hops upstream of AS51699 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

51

adjacent networks

Upstreams
1325%
Peers
3875%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS51699
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer14449
AS34549meerfarbig GmbH & Co. KGDEPeer14070
AS24482SG.GSSGPeer73
AS12586GHOSTnet GmbHDEPeer77
AS24940Hetzner Online GmbHDEPeer52
AS32590Valve CorporationUSPeer52
AS25091IP-Max SACHPeer52
AS7768Nuh Ahmet Firat trading as TEKNET YAZILIM VE BILGISAYAR TEKNOLOJILERITRPeer52
AS8298IPng Networks GmbHCHPeer52
AS213151Christian ElsenDEPeer52

Prefixes

The largest blocks AS51699 originates, widest first.

Largest prefixes originated by AS51699
PrefixAddressesVisibility
5.1.64.0/2425676/76
5.1.65.0/2425676/76
2a0f:b80:4::/46262k × /6462/63
2a05:4741:6::/4865.5k × /6462/63
2a07:6fc0:5::/4865.5k × /6462/63

Routing health

How AS51699's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%5
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 3 prefixes

  • /46262k × /6433.3%1
  • /4865.5k × /6466.7%2

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS51699 started or stopped in this period.

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