Avast Software s.r.o.
AVAST Software s.r.o.
GLEIF verified
Complete entity footprint
4 linked clusters ·
150 netblocks ·
271,047 IPv4 addresses
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
315700B0ZB79FJXEO196
Registered name
Avast Software s.r.o.
Jurisdiction
Cluster stats
| Netblocks | 86 · 30,436 IPv4 addresses |
| Registered in | Czechia (56) · Ireland (6) · United States (3) · Romania (2) · Austria (1) |
| Cluster ID | 208795911 |
| Registry | BGP |
| Owner jurisdiction | CZ |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 315700B0ZB79FJXEO196 |
| Shared handles | clustered on 14 shared RIR contact/maintainer handles |
| Registry names | 6 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
Footprint over time
5 weekly snapshots · JSON
86
0 netblocks since 2026-07-05
2026-07-05
peak 86
2026-07-19
IP Ranges (86)
showing 50 of 86 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 5.45.58.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 5.45.59.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 5.62.36.0/23 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 5.62.54.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 5.62.60.0/23 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 37.156.187.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.64.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.70.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.71.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.74.0/23 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.74.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 69.94.75.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 77.234.40.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 91.213.143.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 166.98.8.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 166.98.10.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 166.98.11.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 185.189.92.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 185.189.94.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 185.189.95.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 195.74.76.0/24 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2001:67c:284::/48 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181::/40 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:108::/45 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:400::/40 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:500::/40 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:600::/40 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:604::/48 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 2a0b:e181:605::/48 | AVAST Software s.r.o. | BGP | ANNOUNCED | ● high |
| 5.45.56.0/21 | AVAST Software s.r.o. | RIPE | ALLOCATED PA | ● low |
| 5.45.56.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.57.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.58.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.59.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.60.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.61.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.62.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.45.63.0/24 | AVAST Software s.r.o. | RIPE | ASSIGNED PA | ● low |
| 5.62.52.0/22 | AVAST-COM | RIPE | SUB-ALLOCATED PA | ● low |
| 5.62.53.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 5.62.54.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 5.104.158.0/23 | Avast Software Romania S.R.L. | RIPE | ALLOCATED PA | ● low |
| 31.14.72.0/22 | AVAST Software s.r.o. | RIPE | ALLOCATED PA | ● low |
| 37.156.184.0/22 | AVAST Software s.r.o. | RIPE | ALLOCATED PA | ● low |
| 37.156.184.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 37.156.185.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 37.156.186.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 37.156.187.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
| 69.94.64.0/20 | AVAST Software s.r.o. | RIPE | ALLOCATED PA | ● low |
| 69.94.64.0/24 | AVAST-COM | RIPE | ASSIGNED PA | ● low |
Corporate group (4 confirmed entities)
+1 additional unconfirmed candidate not shown — full list (JSON)- Gen Digital Inc. 37 blocks
- NortonLifeLock Ireland Limited 17 blocks
- SYMANTEC 10 blocks
Network trust
what's this?
RPKI hygiene: B
how networks compare →
88.4%
of checked blocks have valid RPKI ROA coverage
(76 of 86)
Possible discrepancies (2)
These blocks are registered to AVAST Software s.r.o. 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.
| 77.234.47.0/24 /24 | authorized for AS198621 — Bernd Klaus |
| 185.189.92.0/24 /24 | authorized for AS206334 — Teleradiocompany Start LLC |
NIC Handles
AS198605
ASW-MNT
ASW-MNT
AVIRA-MNT
DIALTELECOM-MNT
DUMY-RIPE
DUMY-RIPE
ORG-ASS55-RIPE
ORG-ASa95-RIPE
PRIO-MNT
PRIVAX-MNT
RIPE-NCC-END-MNT
+2 more