ISP Alliance a.s.
Data as of 2026-09-06
BGP inherited
This organisation
| Netblocks | 112 · 53,540 IPv4 addresses |
| IPv6 | 34 prefixes (largest 2a02:17a0::/29) |
| Registered in | Czechia (84) · Israel (4) · Ukraine (4) · MD (2) · Russia (1) · SY (1) |
| Record ID | 236174076 |
| Registry | BGP |
| Customers | see who runs inside this network → |
Evidence & provenance ?
| Attribution | BGP parent (inherited) |
| Shared handles | clustered on 41 shared RIR contact/maintainer handles |
| Registry names | 11 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
IP Ranges (112)
⬇ 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 |
| 78.111.117.0/24 | 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 |
| 213.109.174.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 213.109.175.0/24 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 217.75.208.0/20 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2001:678:112c::/48 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2001:7f8:14::33:1/128 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 2001:7f8:14::33:2/128 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 2001:7f8:7f::22/128 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 2001:7f8:7f::23/128 | ISP Alliance | PEERINGDB | ASSIGNED | ● high |
| 2a02:17a0::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a02:17a0::/30 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a02:17a0:d000::/36 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a03:2a80::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a03:2a82::/31 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a03:4260::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a04:7bc0::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a04:7bc7::/32 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a07:bc0::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 2a07:9100::/29 | ISP Alliance a.s. | BGP | ANNOUNCED | ● high |
| 5.39.200.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 37.221.240.0/20 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 45.153.192.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 79.134.212.80/30 | ISP-LAN | RIPE | ASSIGNED PA | ● low |
| 80.179.116.240/28 | ISP-Lab | RIPE | ASSIGNED PA | ● low |
| 85.255.88.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 95.212.144.0/25 | ISP-NOC | RIPE | ASSIGNED PA | ● low |
| 109.226.35.216/30 | ISP_LAB | RIPE | ASSIGNED PA | ● low |
| 185.19.0.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.64.220.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.73.100.0 – 185.73.111.255 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.74.60.0/23 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.97.24.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.116.51.0/24 | ISP Alliance | RIPE | ASSIGNED PA | ● low |
| 185.188.100.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 185.207.168.0/22 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 193.104.7.0/24 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 193.104.12.0/24 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 193.104.41.0/24 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 193.104.67.0/24 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 195.12.39.0/24 | ISP Alliance a.s. | RIPE | ALLOCATED PA | ● low |
| 212.199.65.120/30 | ISP-Lab | RIPE | ASSIGNED PA | ● low |
| 212.199.202.128/25 | ISP-Lab | RIPE | ASSIGNED PA | ● low |
| 217.75.217.0/24 | ISP Alliance | RIPE | ASSIGNED PA | ● low |
| 2a00:b740:1::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:b740:2::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:b740:3::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:b740:4::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:b740:5::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:b740:6::/48 | ISP-NET6 | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a03:9200::/32 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a03:d840::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a04:c740::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a04:f940::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a06:400::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a06:bac0::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a09:fc00::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a0a:10c0::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a0a:ddc0::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a0d:3140::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a0e:3c00::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a0f:9300::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
| 2a10:8140::/29 | ISP Alliance a.s. | RIPE | ALLOCATED-BY-RIR | ● low |
IPv6 ranges (34)
showing the 15 largest allocationsFootprint over time
11 weekly snapshots · JSON
138
+19 netblocks since 2026-07-05
2026-07-05
peak 159
2026-09-06
Domains hosted in this network
what's this?Customer-delegated space
how is this classified?Network trust
what's this?
RPKI hygiene: C
how networks compare →
79.7%
of checked blocks have valid RPKI ROA coverage
(110 of 138)
Possible discrepancies (19)
These blocks are registered to ISP Alliance a.s. but cryptographically authorized for a different, unrelated network (5 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 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. |
| 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. |
| 193.104.12.0/24 /24 | authorized for AS207886 — ECOMP spol s r.o. |
+4 more — see the REST API
NIC Handles
AC32880-RIPE
AC38633-RIPE
AS197393
AS201464
AS201476
AS202131
AS202774
AS210712
AS47232
AS47232
AS52084
AS56522
+29 more