Sirsi Dynix

SirsiDynix
Data as of 2026-09-13
Registry
This organisation
Netblocks21 · 71,168 IPv4 addresses
Registered in United States (20) · MD (1)
Record ID241136253
RegistryBGP
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution Registry record
Shared handles clustered on 6 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (21)

⬇ export CSV
CIDR Org name Registry Status Confidence
192.65.218.0/24 SirsiDynix ARIN DIRECT ALLOCATION ● high
192.150.149.0/24 SirsiDynix BGP ANNOUNCED ● high
192.206.158.0/23 SirsiDynix BGP ANNOUNCED ● high
192.206.161.0/24 SirsiDynix BGP ANNOUNCED ● high
192.206.162.0/24 SirsiDynix BGP ANNOUNCED ● high
206.15.48.0/20 SirsiDynix ARIN DIRECT ALLOCATION ● high
206.187.0.0/16 SirsiDynix ARIN DIRECT ALLOCATION ● high
206.187.24.0/22 SirsiDynix BGP ANNOUNCED ● high
206.187.24.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.25.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.26.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.27.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.28.0/22 SirsiDynix BGP ANNOUNCED ● high
206.187.32.0/22 SirsiDynix BGP ANNOUNCED ● high
206.187.36.0/22 SirsiDynix BGP ANNOUNCED ● high
206.187.60.0/22 SirsiDynix BGP ANNOUNCED ● high
206.187.80.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.81.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.82.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.83.0/24 SirsiDynix BGP ANNOUNCED ● high
206.187.88.0/22 SirsiDynix BGP ANNOUNCED ● high

Footprint over time

12 weekly snapshots · JSON
21 +1 netblocks since 2026-07-05
2026-07-05 peak 21 2026-09-13

Other domains hosted in this network

what's this?
sirsi.net sirsidynix.net sirsidynix.net.au sa.gov.au gre.ac.uk rcseng.ac.uk on.ca onecard.network ibfd.org usp.ac.fj lacountylibrary.org kotui.org.nz nsw.gov.au cochiselibrary.org griver.org moore.edu.au sheffield.gov.uk tate.org.uk ab.ca ccrls.org

Network trust

what's this?
RPKI hygiene: D how networks compare →
33.3% of checked blocks have valid RPKI ROA coverage (7 of 21)
Possible discrepancies (1)

These blocks are registered to SirsiDynix 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.

206.15.48.0/20 /20 authorized for AS213705 — DIGITAL NETWORK S.R.L.

NIC Handles

AS1746 NOC1883-ARIN NOC1883-ARIN NOC1883-ARIN SC-2233 YANCE13-ARIN