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.
185.231.16.0/24 ·
Pass: 185.231.16.0/24 is announced by AS39563 (UCSYSTEMS). Nothing to fix.
| Announced as | 185.231.16.0/24 |
|---|---|
| Origin AS | AS39563 UCSYSTEMS |
| Holder | UCSYSTEMS-MNT |
| Allocation | RIPE NCC, Netherlands (NL), allocated 2017-11-09 |
| Size | 256 addresses |
| Abuse contact | abuse@ucsystems.nl |
Checks
Routing and RPKI Announced as 185.231.16.0/24 by AS39563.
- Pass: Announced as 185.231.16.0/24 by AS39563.
- Pass: 185.231.16.0/24 from AS39563 is RPKI valid.
- Pass: Seen by 100% of RIPE RIS peers.
| Route | 185.231.16.0/24 |
|---|---|
| Origin AS | AS39563 UCSYSTEMS CTA Systems B.V. RPKI valid |
| IRR route objects | RIPE |
| Visibility (RIS peers) | 319 / 319 |
| First seen | 2019-07-16 |
| ROA prefix | Max length | Origin AS |
|---|---|---|
| 185.231.16.0/24 | /24 | AS39563 |
Source: RIPEstat (RIPE NCC RIS, Routinator)
Open in ASN & BGP prefix lookupReverse DNS Reverse DNS is delegated (16.231.185.in-addr.arpa).
- Pass: Reverse DNS is delegated (16.231.185.in-addr.arpa).
| Zone | Nameservers |
|---|---|
| 16.231.185.in-addr.arpa | ns1-07.azure-dns.com, ns2-07.azure-dns.net, ns3-07.azure-dns.org, ns4-07.azure-dns.info |
Registration Found at rdap.db.ripe.net.
- Pass: Found at rdap.db.ripe.net.
| Name | NL-UCSYSTEMS-20171109-1 |
|---|---|
| Handle | 185.231.16.0 - 185.231.16.255 |
| Range | 185.231.16.0 – 185.231.16.255 |
| Country | NL |
| Status | active |
| Registered | 2019-07-16T20:13:11Z |
| Last changed | 2021-06-03T19:13:53Z |
| Abuse contact | abuse@ucsystems.nl |
| Registry (RIR) | RIPE NCC |
|---|---|
| Country | Netherlands (NL) |
| Delegated on | 2017-11-09 |
| Status | Allocated |
| Delegated range | 185.231.16.0/22 (185.231.16.0 – 185.231.19.255) |
Source: RIR delegation data, updated daily. The country is where the range was registered, not necessarily where it is used.
| Role | Name | |
|---|---|---|
| registrant | UCSYSTEMS-MNT | |
| abuse | Abuse-C Role | abuse@ucsystems.nl |
Source: https://rdap.db.ripe.net/ip/185.231.16.0/24. Registration data from rdap.db.ripe.net, shown under its terms of use (terms): not for marketing or bulk collection. Personal contacts in this registry are not shown.
Open in WHOIS / RDAP lookupPeeringDB AS39563 is in PeeringDB as UC Systems.
- Pass: AS39563 is in PeeringDB as UC Systems.
- Info: Peering policy: Open.
- Info: Present at 12 internet exchanges with 14 ports (140G in total).
About the network that announces this space, so not in the fix list.
| Network | UC Systems (CTA Systems B.V.) |
|---|---|
| AS number | AS39563 |
| Type | NSP, Regional |
| Website | https://ucsystems.nl |
| IRR as-set | AS-UCSYSTEMS |
| Prefixes (IPv4 / IPv6) | 30 / 10 |
| Traffic | 1-5Gbps, Mostly Inbound |
| Peering policy | Open |
| Locations | Not Required |
| Ratio required | No |
| Contracts | Not Required |
| Last updated | 2026-10-30 |
| Abuse | abuse@ucsystems.nl |
|---|---|
| NOC | service@ucsystems.nl |
| Policy | peering@ucsystems.nl |
Source: PeeringDB. Results are cached for an hour.
Open in PeeringDB lookup