Sign inMonitor a domain
AS1103

AS1103 is SURF B.V..

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (3 Nov 2026)

Short answer

AS1103 belongs to SURF B.V.. DB-IP Lite attributes 7,191,296 IPv4 addresses in 69 ranges and 6 IPv6 ranges to it, all or nearly all of the IPv4 space in Netherlands. The number is registered with RIPE NCC in Netherlands on 1 Sept 1993.

Facts for AS1103
Operator (DB-IP)SURF B.V.
IPv4 addresses7,191,296
IPv4 ranges69
IPv6 ranges6
RegistryRIPE NCC
Registered1 Sept 1993
Registry countryNetherlands (NL)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

SURF B.V. hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists 6 IPv6 ranges for AS1103, so customers can get IPv6 addresses, which databases place separately from IPv4.

Where its IPv4 space is used, according to DB-IP

NL100%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
129.125.0.0 – 129.125.255.255129.125.0.0/1665,536
130.37.0.0 – 130.37.255.255130.37.0.0/1665,536
131.174.0.0 – 131.174.255.255131.174.0.0/1665,536
131.211.0.0 – 131.211.255.255131.211.0.0/1665,536
131.224.0.0 – 131.224.255.255131.224.0.0/1665,536
132.229.0.0 – 132.229.255.255132.229.0.0/1665,536
134.221.0.0 – 134.221.255.255134.221.0.0/1665,536
136.231.0.0 – 136.231.255.255136.231.0.0/1665,536
137.56.0.0 – 137.56.255.255137.56.0.0/1665,536
137.120.0.0 – 137.120.255.255137.120.0.0/1665,536
137.224.0.0 – 137.224.255.255137.224.0.0/1665,536
139.63.0.0 – 139.63.255.255139.63.0.0/1665,536
141.252.0.0 – 141.252.255.255141.252.0.0/1665,536
143.121.0.0 – 143.121.255.255143.121.0.0/1665,536
145.0.0.0 – 145.1.127.255145.0.0.0/16, 145.1.0.0/1798,304
145.2.0.0 – 145.3.255.255145.2.0.0/15131,072
145.5.0.0 – 145.5.255.255145.5.0.0/1665,536
145.9.0.0 – 145.9.255.255145.9.0.0/1665,536
145.19.0.0 – 145.20.255.255145.19.0.0/16, 145.20.0.0/16131,072
145.23.0.0 – 145.24.255.255145.23.0.0/16, 145.24.0.0/16131,072
145.28.0.0 – 145.29.255.255145.28.0.0/15131,072
145.33.0.0 – 145.33.255.255145.33.0.0/1665,536
145.37.0.0 – 145.39.255.255145.37.0.0/16, 145.38.0.0/15196,608
145.41.0.0 – 145.41.255.255145.41.0.0/1665,536
145.44.0.0 – 145.44.255.255145.44.0.0/1665,536
145.48.0.0 – 145.49.255.255145.48.0.0/15131,072
145.51.0.0 – 145.52.255.255145.51.0.0/16, 145.52.0.0/16131,072
145.74.0.0 – 145.76.255.255145.74.0.0/15, 145.76.0.0/16196,608
145.81.0.0 – 145.81.255.255145.81.0.0/1665,536
145.85.0.0 – 145.85.255.255145.85.0.0/1665,536
145.88.0.0 – 145.93.255.255145.88.0.0/14, 145.92.0.0/15393,216
145.95.0.0 – 145.97.31.255145.95.0.0/16, 145.96.0.0/16 …139,264
145.97.48.0 – 145.97.255.255145.97.48.0/20, 145.97.64.0/18 …53,248
145.98.8.0 – 145.98.255.255145.98.8.0/21, 145.98.16.0/20 …63,488
145.100.0.0 – 145.100.117.255145.100.0.0/18, 145.100.64.0/19 …30,208
145.100.120.0 – 145.101.255.255145.100.120.0/21, 145.100.128.0/17 …100,352
145.102.2.0 – 145.102.3.255145.102.2.0/23512
145.102.6.0 – 145.102.131.255145.102.6.0/23, 145.102.8.0/21 …32,256
145.102.136.0 – 145.103.255.255145.102.136.0/21, 145.102.144.0/20 …96,256
145.107.0.0 – 145.107.3.255145.107.0.0/221,024
145.107.8.0 – 145.108.255.255145.107.8.0/21, 145.107.16.0/20 …129,024
145.116.64.0 – 145.116.207.255145.116.64.0/18, 145.116.128.0/18 …36,864
145.116.224.0 – 145.118.255.255145.116.224.0/19, 145.117.0.0/16 …139,264
145.120.0.0 – 145.127.127.255145.120.0.0/14, 145.124.0.0/15 …491,520
145.136.0.0 – 145.138.255.255145.136.0.0/15, 145.138.0.0/16196,608
145.140.0.0 – 145.175.255.255145.140.0.0/14, 145.144.0.0/12 …2,359,296
156.83.0.0 – 156.83.255.255156.83.0.0/1665,536
192.16.188.0 – 192.16.189.255192.16.188.0/23512
192.31.231.0 – 192.31.231.255192.31.231.0/24256
192.33.36.0 – 192.33.36.255192.33.36.0/24256
2001:610:: – 2001:610:11f:ffff:ffff:ffff:ffff:ffff2001:610::/40IPv6
2001:610:121:: – 2001:610:8fff:ffff:ffff:ffff:ffff:ffff2001:610:121::/48IPv6
2001:610:9080:: – 2001:617:ffff:ffff:ffff:ffff:ffff:ffff2001:610:9080::/41IPv6
2001:678:1334:: – 2001:678:1334:ffff:ffff:ffff:ffff:ffff2001:678:1334::/48IPv6
2001:67c:1200:: – 2001:67c:1200:ffff:ffff:ffff:ffff:ffff2001:67c:1200::/48IPv6
2001:67c:262c:: – 2001:67c:262c:ffff:ffff:ffff:ffff:ffff2001:67c:262c::/48IPv6
Showing 50 of 69 IPv4 and 6 of 6 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 4 Nov 2026