Duocast B.V.
AS31477 is Duocast B.V. (duocast.nl). It announces 30,720 IPv4 addresses in 43 prefixes, and 12 IPv6 prefixes.
The Netherlands· RIPE· allocated 2004-05-26· hosting
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- The Netherlands30,720 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- DUOCAST-AS
- name
- Duocast B.V.
- org
- ORG-DA16-RIPE
- org name
- Duocast B.V.
- org address
- Friesestraatweg 213d, 9743 AD, Groningen, NETHERLANDS
- org country
- NL
- country
- NL
- source
- ripe
- status
- ASSIGNED
- created
- 2004-05-26
- updated
- 2026-09-25
- remarks
- We have an open peering policy. If you're not / not peering with us already, please contact us / at peering@duocast.nl / --- Peering Exchanges -------------------------- / Exchange : AMS-IX / Location : Globalswitch, Amsterdam / Speed : 10 Gbps / IPv4 : 80.249.209.98 / IPv6 : 2001:7f8:1::A503:1477:1 / Exchange : NL-IX / Location : EuNetworks, Amsterdam / Speed : 10 Gbps / IPv4 : 193.239.116.132 / IPv6 : 2001:7f8:13::a503:1477:1 / --- Communities sent to customers -------------- / Learned at Globalswitch Ams
- maintainer
- MNT-DUOCAST|RIPE-NCC-END-MNT
- abuse name
- Duocast role
- abuse email
- abuse@duocast.nl
- abuse kind
- role
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP511watchguard, draytek1.66%
- anyip, ipweb0.01%
- None here
- None here
- None here
- None here
- Hosting IP11,77638.33%
- None here
- None here
- None here
- SSH IP1,1473.73%
- SMTP IP9253.01%
- 0.51%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2001:678:2b4::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2001:678:750::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2001:678:d0c::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2001:67c:6b8::/48 | The Netherlands | not found | 20 | 2026-10-02 |
| 2a00:70c0::/48 | The Netherlands | not found | 20 | 2026-10-02 |
| 2a01:1b0::/32 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a01:1b2::/32 | The Netherlands | not found | 20 | 2026-10-02 |
| 2a07:3501:1020::/48 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a07:3505:80::/44 | The Netherlands | not found | 20 | 2026-10-02 |
| 2a07:3505:81::/48 | The Netherlands | not found | 20 | 2026-10-02 |
| 2a0b:6d80::/29 | The Netherlands | valid | 20 | 2026-10-02 |
| 2a0e:7280::/29 | The Netherlands | valid | 20 | 2026-10-02 |
Test the real build first.
An evaluation license puts a full current build in your hands — every row, every column, no sampling — so you can measure it against your own traffic before anyone talks about terms.