ISI

ISI Communications
Data as of 2026-10-04
GLEIF verified
LEI
969500C7ZJ9IIVCWM794
Registered name
ISI
Jurisdiction
FR
Ultimate parent
No parent on file in GLEIF
This organisation
Netblocks29 · 3,900 IPv4 addresses
IPv6 5 prefixes (largest 2606:9a00::/32)
Registered in United Kingdom (14) · United States (4) · Germany (3) · Greece (1) · Italy (1) · SN (1)
Also registered under this name 84 netblocks across 23 separate records
Record ID245683357
RegistryAFRINIC
Owner jurisdictionFR
Customerssee who runs inside this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 969500C7ZJ9IIVCWM794
Shared handles clustered on 22 shared RIR contact/maintainer handles
Registry names 10 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (29)

⬇ export CSV
CIDR Org name Registry Status Confidence
74.116.26.0 – 74.116.31.255 ISI Communications ARIN DIRECT ALLOCATION ● high
74.116.26.0/23 ISI Communications BGP ANNOUNCED ● high
74.116.28.0/22 ISI Communications BGP ANNOUNCED ● high
193.38.176.0/24 ISI BGP ANNOUNCED ● high
193.38.176.0/23 ISI BGP ANNOUNCED ● high
193.38.177.0/24 ISI BGP ANNOUNCED ● high
193.38.178.0/24 ISI BGP ANNOUNCED ● high
193.38.178.0/23 ISI BGP ANNOUNCED ● high
193.38.179.0/24 ISI BGP ANNOUNCED ● high
193.38.180.0/24 ISI BGP ANNOUNCED ● high
193.38.180.0/23 ISI BGP ANNOUNCED ● high
193.38.181.0/24 ISI BGP ANNOUNCED ● high
193.38.190.0/23 ISI BGP ANNOUNCED ● high
193.38.190.0/24 ISI BGP ANNOUNCED ● high
193.38.191.0/24 ISI BGP ANNOUNCED ● high
195.251.58.0/24 ISI-NET RIPE ASSIGNED PA ● high
206.41.110.40/32 ISI Communications PEERINGDB ASSIGNED ● high
2001:504:41:110::40/128 ISI Communications PEERINGDB ASSIGNED ● high
2001:648:23b0::/48 ISI-NET RIPE ASSIGNED ● high
2606:9a00::/32 ISI Communications BGP ANNOUNCED ● high
5.7.232.160/29 ISI-GMBH-NET RIPE ASSIGNED PA ● low
62.134.191.212/30 ISI RIPE ASSIGNED PA ● low
89.15.247.56/29 ISI-NET RIPE ASSIGNED PA ● low
178.63.163.24/29 ISI-AG RIPE ASSIGNED PA ● low
194.130.42.208/28 ISI RIPE ASSIGNED PA ● low
213.154.77.145 – 213.154.77.151 ISI AFRINIC ASSIGNED PA ● low
217.223.219.8/29 isi-srl RIPE ASSIGNED PA ● low
2a01:4f8:140:94ac::/64 ISI-AG RIPE ASSIGNED ● low
2a01:4f8:141:22ed::/64 ISI-AG RIPE ASSIGNED ● low

IPv6 ranges (5)

CIDR
2606:9a00::/32
2001:648:23b0::/48
2a01:4f8:140:94ac::/64
2a01:4f8:141:22ed::/64
2001:504:41:110::40/128

Footprint over time

15 weekly snapshots · JSON
29 +1 netblocks since 2026-07-05
2026-07-05 peak 29 2026-10-04

Network trust

what's this?
RPKI hygiene: C how networks compare →
72.4% of checked blocks have valid RPKI ROA coverage (21 of 29)
Possible discrepancies (4)

These blocks are registered to ISI Communications 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.

2001:648:23b0::/48 /48 authorized for AS5408 — National Infrastructures for Research and Technology S.A.
195.251.58.0/24 /24 authorized for AS5408 — National Infrastructures for Research and Technology S.A.
193.38.178.0/24 /24 authorized for AS7018 — AT&T Enterprises, LLC
193.38.179.0/24 /24 authorized for AS7018 — AT&T Enterprises, LLC

NIC Handles

AS1849-MNT AS1961 AS31845 AS31845 CIP-MNT DGH10-ARIN DGH10-ARIN DGH10-ARIN DGH10-ARIN DUMY-RIPE DUMY-RIPE GRNET-NOC +10 more