subnet.im

AS218628Mariusz Mikolajczak trading as CodeBy

PolandRegistryRIPE NCC

As of 12th November 2026, AS218628 (Mariusz Mikolajczak trading as CodeBy), a network registered in Poland with RIPE NCC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,995th-largest of the 80,772 networks we see originating IPv4, and the 1,351st-largest of 2,109 in Poland. It is seen behind 1 upstream network, most often AS214762 (Sebastian Stefanek trading as MatHost.eu). 50% 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

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS218628 is seen behind, one and two hops out, drawn from real AS paths.

AS218628Toward the internet core
Upstream graph for AS218628: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS218628Mariusz Mikolajcz…This networkAS214762Sebastian Stefane…AS6204INTERKVM HOST SRLAS6939Hurricane Electri…

Networks observed one and two hops upstream of AS218628 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS218628
NetworkCountryRelationshipPathsVantage pts
AS214762Sebastian Stefanek trading as MatHost.euPLPeer140140

Prefixes

The largest blocks AS218628 originates, widest first.

Largest prefixes originated by AS218628
PrefixAddressesVisibility
44.30.222.0/2425677/78
2a06:9801:1565::/4865.5k × /6463/64

Routing health

How AS218628'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

  • Valid50.0%1
  • Invalid0.0%0
  • No ROA50.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 13th Oct 2026.

No announcement by AS218628 started or stopped in this period.

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