ISG Technology
Cluster stats
Netblocks15
All fragments 73 blocks across 25 clusters
Cluster ID191794914
RegistryAPNIC
Customersfind customers using this network →
Evidence & provenance ?
Attribution unresolved
Shared handles clustered on 17 shared RIR contact/maintainer handles
Registry names 8 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

IP Ranges (15)

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CIDR Org name Registry Status Confidence
205.173.96.0/21 ISG Technology ARIN ● high
205.173.96.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.97.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.98.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.99.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.100.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.101.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.102.0/24 ISG Technology BGP ANNOUNCED ● high
205.173.103.0/24 ISG Technology BGP ANNOUNCED ● high
185.4.165.96/27 ISG-IPT RIPE ASSIGNED PA ● low
195.56.43.72/29 ISG-HU RIPE ASSIGNED PA ● low
203.177.154.0/24 ISG_DS3-PH APNIC ASSIGNED NON-PORTABLE ● low
212.116.138.64/29 ISG-Technology RIPE ASSIGNED PA ● low
213.145.101.64/29 ISG_Technology RIPE ASSIGNED PA ● low
2a00:2381:f2fc::/48 ISG-TECHNOLOGY RIPE AGGREGATED-BY-LIR ● low

Network trust

what's this?
RPKI hygiene: D how networks compare →
33.3% of checked blocks have valid RPKI ROA coverage (5 of 15)
Possible discrepancies (2)

These blocks are registered to ISG Technology but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a00:2381:f2fc::/48 /48 authorized for AS2856 — British Telecommunications PLC
203.177.154.0/24 /24 authorized for AS4775 — Globe Telecom (GMCR,INC)

NIC Handles

AG698-AP AS20289 AS3340-MNT BTNET-MNT COITD-ARIN DUMY-RIPE DUMY-RIPE GINA4-AP GINA4-AP ISGTE-1 ITD-MNT MAINT-MGR-AP +5 more