Network report
Who holds an IP address, prefix or AS number, how it is routed (origin AS, RPKI, IRR), its reverse DNS, blocklist listings and PeeringDB record, with what to fix first.
Checking routing, RPKI, reverse DNS, blocklists and the registry. This usually takes 3 to 10 seconds.
Warning: AS12874 (FASTWEB Fastweb SpA) announces 111 IPv4 and 18 IPv6 prefixes. 2 warnings
| AS page | AS12874 |
|---|---|
| Holder | FASTWEB Fastweb SpA |
| Allocation | RIPE NCC, Italy (IT), allocated 1999-12-17 |
| Prefixes (IPv4 / IPv6) | 111 / 18 |
| RPKI valid | 78% (100 / 129) |
| Upstreams and peers | 47 |
| Peering policy | Selective |
What to fix
-
Warning
10 of 129 announced prefixes have no ROA (RPKI not found): 5.1.44.0/24, 31.131.240.0/21, 45.90.124.0/24, 62.177.0.0/20, 62.182.103.0/24 (+5).
Without a ROA, networks cannot tell your routes from a hijack.
Fix: Create a ROA for each at your RIR portal, with origin AS12874 and a max length equal to the prefix length:
5.1.44.0/24 AS12874 max-length /24 31.131.240.0/21 AS12874 max-length /21 45.90.124.0/24 AS12874 max-length /24 62.177.0.0/20 AS12874 max-length /20 62.182.103.0/24 AS12874 max-length /24 64.126.250.0/24 AS12874 max-length /24 85.118.144.0/23 AS12874 max-length /23 91.225.244.0/22 AS12874 max-length /22 92.242.172.0/22 AS12874 max-length /22 158.255.240.0/21 AS12874 max-length /21
-
Warning
No public NOC, policy or technical contact.
Other networks use these addresses to set up peering and to reach you during an incident.
Fix: Add a role contact (for example noc@ or peering@ an address you monitor) with visibility Public.
Checks
Routing and RPKI 10 of 129 announced prefixes have no ROA (RPKI not found): 5.1.44.0/24, 31.131.240.0/21, 45.90.124.0/24, 62.177.0.0/20, 62.182.103.0/24 (+5).
- Pass: AS12874 announces 111 IPv4 and 18 IPv6 prefixes.
- Warning: 10 of 129 announced prefixes have no ROA (RPKI not found): 5.1.44.0/24, 31.131.240.0/21, 45.90.124.0/24, 62.177.0.0/20, 62.182.103.0/24 (+5).
- Info: 100 of 129 announced prefixes are RPKI valid.
- Info: The RPKI state of 19 prefixes was not looked up (no ROA of AS12874 covers them; only the first 10 are checked).
- Pass: Every announced prefix has an IRR route object.
- Info: 47 upstreams and peers, 207 downstream networks seen.
| Holder | FASTWEB Fastweb SpA |
|---|---|
| IPv4 prefixes | 111 |
| IPv6 prefixes | 18 |
| RPKI | 100 valid · 10 not found · 19 not looked up |
| Downstream networks | 207 |
| Prefix | RPKI |
|---|---|
| 5.1.44.0/24 | No ROA |
| 31.131.240.0/21 | No ROA |
| 45.90.124.0/24 | No ROA |
| 62.177.0.0/20 | No ROA |
| 62.182.103.0/24 | No ROA |
| 64.126.250.0/24 | No ROA |
| 85.118.144.0/23 | No ROA |
| 91.225.244.0/22 | No ROA |
| 92.242.172.0/22 | No ROA |
| 158.255.240.0/21 | No ROA |
Announced prefixes 129
Showing the first 100.
Source: RIPEstat (RIPE NCC RIS, Routinator, IRR); AS names: Team Cymru
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PeeringDB No public NOC, policy or technical contact.
- Pass: AS12874 is in PeeringDB as Fastweb.
- Info: Peering policy: Selective.
- Info: Present at 12 internet exchanges with 13 ports (1.4T in total).
- Warning: No public NOC, policy or technical contact.
| Network | Fastweb |
|---|---|
| AS number | AS12874 |
| Type | Cable/DSL/ISP, Europe |
| Website | http://www.fastweb.it |
| IRR as-set | AS-FASTWEB-GLOBAL |
| Prefixes (IPv4 / IPv6) | 1500 / 150 |
| Traffic | 10-20Tbps, Mostly Inbound |
| Peering policy | Selective |
| Locations | Not Required |
| Ratio required | No |
| Contracts | Private Only |
| Last updated | 2026-07-14 |
Source: PeeringDB. Results are cached for an hour.
Open in PeeringDB lookup