subnet.im

AS44103The Mastermind Holding B.V.

NetherlandsRegistryRIPE NCCTypeContent

As of 27th September 2026, AS44103 (The Mastermind Holding B.V.), a content network registered in the Netherlands with RIPE NCC, originates 10 IPv4 prefixes covering 2.8k addresses and 8 IPv6 prefixes. By IPv4 address space that makes it the 22,343rd-largest of the 79,525 networks we see originating IPv4, and the 316th-largest of 1,023 in the Netherlands. It is seen behind 14 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS5405 (Inter.link GmbH), and in front of 22 downstream networks. 61% of its announcements have 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

10

IPv6 prefixes

8

IPv4 addresses

2.8k

IPv6 /64s

73B

Upstream graph

The networks AS44103 is seen behind, one and two hops out, drawn from real AS paths.

AS44103Toward the internet core
Upstream graph for AS44103: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS44103The Mastermind Ho…This networkAS5405Inter.link GmbHAS6204TMRC GROUP SRLAS6939Hurricane Electri…AS49127Asimo Networks B.…AS200461Ian David KlemmAS3491PCCW Global (HK) …AS13237euNetworks GmbHAS18106Viewqwest Pte LtdAS20130Depaul UniversityAS8283Netwerkvereniging…AS58212dataforest GmbHAS400304Redoubt Networks …

Networks observed one and two hops upstream of AS44103 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

133

adjacent networks

Upstreams
1411%
Peers
9773%
Downstreams
2217%

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

Upstreams of AS44103
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer1,01048
AS5405Inter.link GmbHDEPeer72456
AS200461Ian David KlemmDEPeer614145
AS49127Asimo Networks B.V.NLPeer27718
AS6204TMRC GROUP SRLROPeer26636
AS50673Serverius Holding B.V.NLPeer17830
AS8529Zain Omantel International FZ-LLCAEPeer482
AS39122Blacknight Internet Solutions LimitedIEPeer422
AS24940Hetzner Online GmbHDEPeer392
AS8298IPng Networks GmbHCHPeer372

Prefixes

The largest blocks AS44103 originates, widest first.

Largest prefixes originated by AS44103
PrefixAddressesVisibility
103.163.186.0/2351280/81
45.93.119.0/2425680/81
45.139.163.0/2425680/81
77.90.23.0/2425680/81
103.163.186.0/2425681/81
178.18.154.0/2425681/81
178.18.155.0/2425681/81
178.218.145.0/2425680/81
185.150.96.0/2425680/81
185.249.217.0/2425681/81

Routing health

How AS44103'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

  • Valid61.1%11
  • Invalid0.0%0
  • No ROA38.9%7

Propagation

  • Globally propagated90% of full-feed peers or more100.0%18
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 10 prefixes

IPv6 — 8 prefixes

  • /2934.4B × /6425.0%2
  • /324.3B × /6412.5%1
  • /4016.8M × /6412.5%1
  • /4865.5k × /6450.0%4

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Withdrawn45.43.66.0/2421st Sept 2026

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