Sebastian Stefanek trading as MatHost.eu

Data as of 2026-09-06
BGP inherited
This organisation
Netblocks19 · 1,280 IPv4 addresses
IPv6 14 prefixes (largest 2a13:c8c4:1000::/36)
Registered in Germany (2) · Poland (2) · Czechia (1) · United States (1)
Record ID236366954
RegistryBGP
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 29 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (19)

⬇ export CSV
CIDR Org name Registry Status Confidence
44.30.200.0/24 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
87.232.107.0/24 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
89.144.32.0/24 Sebastian Stefanek trading as MatHost.eu RIPE ASSIGNED PA ● high
201.3.238.0/24 Sebastian Stefanek trading as MatHost.eu RIPE ASSIGNED PA ● high
201.7.23.0/24 Sebastian Stefanek trading as MatHost.eu RIPE ASSIGNED PA ● high
2a05:dfc1:1410::/44 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a06:1283:8904::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a06:1283:890c::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a07:54c1:c000::/44 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a0f:85c1:80b::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a0f:b240:5c00::/40 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a13:9500:53::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a13:c8c4:1000::/36 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a14:7580:ff9c::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a14:7585:4000::/48 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a14:7585:d200::/44 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a14:7585:d400::/44 Sebastian Stefanek trading as MatHost.eu BGP ANNOUNCED ● high
2a01:4f8:a1:e7::/64 SEBASTIAN-MAY RIPE ASSIGNED ● low
2a01:4f8:191:51ee::/64 SEBASTIAN-ULM RIPE ASSIGNED ● low

IPv6 ranges (14)

Footprint over time

11 weekly snapshots · JSON
27 +6 netblocks since 2026-07-05
2026-07-05 peak 27 2026-09-06

Network trust

what's this?
RPKI hygiene: B how networks compare →
81.5% of checked blocks have valid RPKI ROA coverage (22 of 27)
Possible discrepancies (3)

These blocks are registered to Sebastian Stefanek trading as MatHost.eu but cryptographically authorized for a different, unrelated network (3 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

87.232.107.0/24 /24 authorized for AS135402 — Wired ISP Inc.
201.3.238.0/24 /24 authorized for AS215133 — Jakub Witkowski
201.7.23.0/24 /24 authorized for AS218970 — Amin NezhadKahnoji

NIC Handles

AS135402 AS214762 DUMY-RIPE DUMY-RIPE GHOSTNET-MNT GHOSTNET-MNT GOCODEIT-AUTO-MNT GOCODEIT-AUTO-MNT GOCODEIT-MNT GOCODEIT-MNT HOS-GUN ICA28-RIPE +17 more