Sewan Nederland B.V.
AS50522 is Sewan Nederland B.V. (sewan.nl). It announces 16,384 IPv4 addresses in 11 prefixes, and 1 IPv6 prefixes.
The Netherlands· RIPE· allocated 2010-02-02· isp
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 Netherlands16,380 · 99.98%
- United Kingdom4 · 0.02%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- SEWAN-NL
- name
- Sewan Nederland B.V.
- org
- ORG-PB32-RIPE
- org name
- Sewan Nederland B.V.
- org address
- Science Park 5218, 5692 EG, Son en Breugel, NETHERLANDS
- org country
- NL
- country
- NL
- source
- ripe
- status
- ASSIGNED
- created
- 2010-02-02
- updated
- 2026-05-11
- remarks
- Transits / Peering / Customers
- maintainer
- RIPE-NCC-END-MNT|SEWAN-NL-MNT
- abuse name
- SEWAN-NL-NOC
- abuse email
- abuse@sewan.nl
- abuse phone
- +31 88 0100700
- 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 IP2,117draytek, watchguard, softether_org12.92%
- anyip, geonode, proxyempire0.38%
- None here
- floppydata0.01%
- None here
- None here
- Hosting IP3,42920.93%
- None here
- None here
- None here
- SSH IP2801.71%
- SMTP IP900.55%
- 0.45%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 81.23.244.0/22 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.0.0/22 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.7.0/24 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.32.0/22 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.48.0/20 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.64.0/20 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.96.0/22 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.125.0/24 | The Netherlands | valid | 16 | 2026-10-02 |
| 81.173.126.0/23 | The Netherlands | valid | 16 | 2026-10-02 |
| 109.235.32.0/21 | The Netherlands | valid | 16 | 2026-10-02 |
| 185.61.68.0/22 | The Netherlands | valid | 16 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2a03:be00::/32 | The Netherlands | valid | 19 | 2026-10-02 |
Test the real build first.
An evaluation license puts a full current build in your hands, with no sampling, so you can measure it against your own traffic before anyone talks about terms.