S.J.M. Steffann

Data as of 2026-09-06
BGP inherited
This organisation
Netblocks11 · 3,072 IPv4 addresses
IPv6 5 prefixes (largest 2a00:8640::/29)
Record ID236117931
RegistryBGP
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 9 shared RIR contact/maintainer handles
Registry names 5 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (11)

⬇ export CSV
CIDR Org name Registry Status Confidence
185.54.94.0/24 S.J.M. Steffann BGP ANNOUNCED ● high
2607:fae0:f001::/48 S.J.M. Steffann BGP ANNOUNCED ● high
2607:fae0:f00c::/48 S.J.M. Steffann BGP ANNOUNCED ● high
2607:fae0:f00d::/48 S.J.M. Steffann BGP ANNOUNCED ● high
2a00:8641::/32 S.J.M. Steffann BGP ANNOUNCED ● high
37.77.56.0/21 S.J.M. Steffann RIPE ALLOCATED PA ● low
185.54.92.0/26 SJM-STEFFANN-SERVERS1 RIPE ASSIGNED PA ● low
185.54.92.0/22 S.J.M. Steffann RIPE ALLOCATED PA ● low
185.54.92.64/27 SJM-STEFFANN-FRIENDS1 RIPE ASSIGNED PA ● low
185.54.92.96/27 SJM-STEFFANN-LAB1 RIPE ASSIGNED PA ● low
2a00:8640::/29 S.J.M. Steffann RIPE ALLOCATED-BY-RIR ● low

IPv6 ranges (5)

CIDR
2a00:8640::/29
2a00:8641::/32
2607:fae0:f001::/48
2607:fae0:f00c::/48
2607:fae0:f00d::/48

Footprint over time

11 weekly snapshots · JSON
11 -1 netblocks since 2026-07-05
2026-07-05 peak 12 2026-09-06

Network trust

what's this?
RPKI hygiene: C how networks compare →
72.7% of checked blocks have valid RPKI ROA coverage (8 of 11)
Possible discrepancies (3)

These blocks are registered to S.J.M. Steffann but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2607:fae0:f001::/48 /48 authorized for AS8038 — 6connect, Inc.
2607:fae0:f00c::/48 /48 authorized for AS8038 — 6connect, Inc.
2607:fae0:f00d::/48 /48 authorized for AS8038 — 6connect, Inc.

NIC Handles

AS203993 AS57771 DUMY-RIPE DUMY-RIPE ORG-SSP3-RIPE RIPE-NCC-HM-MNT SJMS-RIPE STEFFANN-MNT STEFFANN-MNT