FASTNET DATA INC
Data as of 2026-08-16
BGP inherited
Cluster stats
| Netblocks | 372 · 230,400 IPv4 addresses |
| IPv6 | 24 prefixes (largest 2602:f84a::/48) |
| Registered in | United States (302) · Hong Kong (28) · SC (16) · KH (4) · United Kingdom (2) · United Arab Emirates (1) |
| Cluster ID | 222381018 |
| Registry | AFRINIC |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 21 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
8 weekly snapshots · JSON
380
-46 netblocks since 2026-07-05
2026-07-05
peak 426
2026-08-16
IP Ranges (372)
showing 50 of 372 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 23.135.56.0/24 | FASTNET DATA INC | ARIN | DIRECT ALLOCATION | ● high |
| 98.158.28.0/24 | FASTNET DATA INC | ARIN | ASSIGNMENT | ● high |
| 23.159.248.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.161.196.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.165.40.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.165.248.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.166.168.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.169.184.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.170.48.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.170.49.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.185.168.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.185.200.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.186.88.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 23.249.16.0/20 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.47.236.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.47.248.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.0.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.8.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.16.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.24.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.28.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.28.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.29.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.30.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.31.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.32.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.37.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.38.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.39.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.40.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.41.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.42.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.43.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.44.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.45.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.46.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.47.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.48.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.52.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.52.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.53.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.54.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.55.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.56.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.57.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.58.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.59.0/24 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.49.60.0/22 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.55.0.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
| 38.55.8.0/21 | FASTNET DATA INC | BGP | ANNOUNCED | ● low |
IPv6 ranges (24)
showing the 15 largest allocationsNetwork trust
what's this?
RPKI hygiene: D
how networks compare →
27.9%
of checked blocks have valid RPKI ROA coverage
(106 of 380)
Wholesale/transit re-announcements (32)
These blocks are registered to FASTNET DATA INC but cryptographically authorized across 13 different networks — typical for a large wholesale or transit carrier whose address space is substantially re-announced by downstream customers under their own ASNs, not individually noteworthy.
| 154.205.192.0/20 /20 | authorized for AS140227 — Hong Kong Communications International Co., Limited |
| 154.205.208.0/20 /20 | authorized for AS140227 — Hong Kong Communications International Co., Limited |
| 23.249.16.0/20 /20 | authorized for AS153517 — Ju Link Tech Limited |
| 104.251.224.0/20 /20 | authorized for AS9886 — CTCSCI TECH LIMITED |
| 187.53.192.0/20 /20 | authorized for AS400618 — Prime Security Corp. |
| 198.176.48.0/20 /20 | authorized for AS153517 — Ju Link Tech Limited |
| 38.47.248.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 38.181.40.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 38.181.56.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 154.19.112.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 154.19.120.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 207.56.224.0/21 /21 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 38.47.236.0/22 /22 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 154.19.88.0/22 /22 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
| 154.19.100.0/22 /22 | authorized for AS7607 — JT TELECOM INTERNATIONAL PTE.LTD. |
+17 more — see the REST API
NIC Handles
ABUSE8399-ARIN
AS140227
AS213840
AS36231
AS7488
AS8796
AS9304
CIL1-MNT
CIS1-AFRINIC
CIS1-AFRINIC
FD-298
LARUS-SERVICE-MNT
+9 more