ISP Alliance a.s.
BGP inherited
Cluster stats
| Netblocks | 159 |
| All fragments | 705 blocks across 180 clusters |
| Cluster ID | 204399668 |
| Registry | AFRINIC |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 67 shared RIR contact/maintainer handles |
| Registry names | 28 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
4 weekly snapshots · JSON
159
+40 netblocks since 2026-07-05
2026-07-05
peak 159
2026-07-13
IP Ranges (159)
showing 50 of 159 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 5.39.200.0/23 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 5.183.12.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 46.29.224.0/21 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 46.255.8.0/21 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.194.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.210.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.216.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.223.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.240.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 77.104.245.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 78.111.112.0/20 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 91.192.32.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 91.210.16.109/32 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 91.210.16.143/32 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 93.91.144.0/20 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 93.91.152.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 93.91.154.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 94.138.116.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 94.138.120.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 94.140.25.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 109.235.0.0/21 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 148.59.93.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.0.20.22/32 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 185.0.20.23/32 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 185.1.51.61/32 | ISP "3NET" | PEERINGDB | ASSIGNED | ● high |
| 185.1.63.114/32 | ISP "3NET" | PEERINGDB | ASSIGNED | ● high |
| 185.1.146.9/32 | ISP "3NET" | PEERINGDB | ASSIGNED | ● high |
| 185.15.108.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.40.80.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.52.172.0/23 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.52.172.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.73.100.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.73.104.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.73.108.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.74.61.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.94.4.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.138.68.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.151.171.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.155.32.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 185.167.184.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 193.25.181.215/32 | ISP "3NET" | PEERINGDB | ASSIGNED | ● high |
| 193.107.160.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 193.138.152.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 195.26.25.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 195.138.109.0/24 | isp wifi | RIPE | ASSIGNED PA | ● high |
| 195.138.113.0/24 | isp wifi | RIPE | ASSIGNED PA | ● high |
| 213.108.162.0/23 | ISP Alliance a.s. | RIPE | ASSIGNED PI | ● high |
| 213.109.172.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 213.109.172.0/22 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 213.109.173.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
Network trust
what's this?
RPKI hygiene: C
how networks compare →
74.2%
of checked blocks have valid RPKI ROA coverage
(118 of 159)
Wholesale/transit re-announcements (26)
These blocks are registered to ISP Alliance a.s. but cryptographically authorized across 8 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.
| 2a04:c740::/29 /29 | authorized for AS198668 — Tlapnet s.r.o. |
| 2a04:f940::/29 /29 | authorized for AS204666 — Jiri Tlapak |
| 2a0d:3140::/29 /29 | authorized for AS198668 — Tlapnet s.r.o. |
| 2a10:8140::/29 /29 | authorized for AS207886 — ECOMP spol s r.o. |
| 2a0f:9300::/29 /29 | authorized for AS198668 — Tlapnet s.r.o. |
| 2402:8ac0::/32 /32 | authorized for AS137320 — PT. Internet Service Provider |
| 37.221.240.0/20 /20 | authorized for AS198668 — Tlapnet s.r.o. |
| 185.19.0.0/22 /22 | authorized for AS198668 — Tlapnet s.r.o. |
| 85.255.88.0/22 /22 | authorized for AS204666 — Jiri Tlapak |
| 45.153.192.0/22 /22 | authorized for AS198668 — Tlapnet s.r.o. |
| 185.97.24.0/22 /22 | authorized for AS198668 — Tlapnet s.r.o. |
| 185.74.60.0/23 /23 | authorized for AS198668 — Tlapnet s.r.o. |
| 185.116.51.0/24 /24 | authorized for AS204064 — CEZNET s.r.o. |
| 193.104.67.0/24 /24 | authorized for AS207886 — ECOMP spol s r.o. |
| 193.104.41.0/24 /24 | authorized for AS207886 — ECOMP spol s r.o. |
+11 more — see the REST API
NIC Handles
AC2244-AP
AC32880-RIPE
AC38633-RIPE
AS197393
AS201464
AS201476
AS202131
AS202774
AS210712
AS47232
AS47232
AS52084
+55 more