CALASTONE LIMITED
Calastone Limited
Data as of 2026-08-09
GLEIF verified
Complete entity footprint
11 linked clusters ·
119 netblocks ·
92,280 IPv4 addresses ·
5 IPv6 prefixes
This organisation's clusters combined by evidence —
shared GLEIF corporate family
— not name similarity, so genuinely different organisations that share a name are excluded.
LEI
894500EE472N5MWWAE18
Registered name
CALASTONE LIMITED
Jurisdiction
Cluster stats
| Netblocks | 7 · 560 IPv4 addresses |
| IPv6 | 3 prefixes (largest 2a00:2381:62c::/48) |
| Registered in | United Kingdom (2) · United States (2) |
| Cluster ID | 218198636 |
| Registry | BGP |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 894500EE472N5MWWAE18 |
| Shared handles | clustered on 4 shared RIR contact/maintainer handles |
| Registry names | 3 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
7 weekly snapshots · JSON
7
0 netblocks since 2026-07-05
2026-07-05
peak 7
2026-08-09
IP Ranges (7)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 206.62.32.0/24 | Calastone Limited | BGP | ANNOUNCED | ● high |
| 206.62.33.0/24 | Calastone Limited | BGP | ANNOUNCED | ● high |
| 217.33.20.32/27 | CALASTONE | RIPE | ASSIGNED PA | ● low |
| 217.38.157.0/28 | CALASTONE-LTD | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:62c::/48 | CALASTONE | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:62c::/56 | CALASTONE | RIPE | ASSIGNED | ● low |
| 2a00:2381:62c:100::/56 | CALASTONE-LTD | RIPE | ASSIGNED | ● low |
IPv6 ranges (3)
Corporate group (11 confirmed entities)
- DST Systems, Inc. 50 blocks
- SS&C Technologies, Inc. 20 blocks
- Eze Castle Software LLC 19 blocks
- SS&C FINTECH SERVICES INDIA PRIVATE LIMITED 7 blocks
- SS&C FINANCIAL SERVICES INTERNATIONAL LIMITED 6 blocks
- Advent Software 6 blocks
- INTRALINKS INC. 5 blocks
- SS&C Solutions Pty Limited 3 blocks
- GlobeOp Financial Services 1 blocks
- DST-GLOBAL-SOLUTIONS-LIMITED 1 blocks
Network trust
what's this?
RPKI hygiene: C
how networks compare →
71.4%
of checked blocks have valid RPKI ROA coverage
(5 of 7)
Possible discrepancies (3)
These blocks are registered to Calastone Limited 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.
| 2a00:2381:62c::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:62c::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:62c:100::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
NIC Handles
AS212601
BTNET-MNT
DUMY-RIPE
DUMY-RIPE