Santander

Data as of 2026-08-30
Registry
Cluster stats
Netblocks23
IPv6 2 prefixes (largest 2a00:2381:f9cd::/48)
Registered in Spain (12) · United Kingdom (3) · Portugal (2) · Poland (1) · Hungary (1) · Belgium (1)
All fragments 217 blocks across 16 clusters
Cluster ID231531305
RegistryRIPE
Customersfind customers using this network →
Evidence & provenance ?
Attribution Registry record
Shared handles clustered on 13 shared RIR contact/maintainer handles
Registry names 3 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

10 weekly snapshots · JSON
23 0 netblocks since 2026-07-05
2026-07-05 peak 23 2026-08-30

IP Ranges (23)

⬇ export CSV
CIDR Org name Registry Status Confidence
51.163.16.40/30 SANTANDER RIPE LEGACY ● low
51.163.16.44/30 SANTANDER RIPE LEGACY ● low
62.77.212.252/30 Santander RIPE ASSIGNED PA ● low
82.177.34.64/29 SANTANDER-NET RIPE ASSIGNED PA ● low
193.126.117.184/30 SANTANDER RIPE ASSIGNED PA ● low
194.224.35.240/29 SANTANDER RIPE ASSIGNED PA ● low
194.224.51.88/29 Santander RIPE ASSIGNED PA ● low
194.224.102.192/29 SANTANDER RIPE ASSIGNED PA ● low
195.23.168.120/30 SANTANDER RIPE ASSIGNED PA ● low
195.57.9.48/29 Santander RIPE ASSIGNED PA ● low
195.77.255.48/29 Santander RIPE ASSIGNED PA ● low
195.235.22.144/29 Santander RIPE ASSIGNED PA ● low
195.235.23.72/29 Santander RIPE ASSIGNED PA ● low
209.251.253.0/29 Santander RIPE ASSIGNED PA ● low
212.123.0.176/29 SANTANDER RIPE ASSIGNED PA ● low
213.0.30.88/29 Santander RIPE ASSIGNED PA ● low
213.0.72.192/29 Santander RIPE ASSIGNED PA ● low
213.0.75.72/29 Santander RIPE ASSIGNED PA ● low
213.0.75.240/29 Santander RIPE ASSIGNED PA ● low
213.0.106.136/29 Santander RIPE ASSIGNED PA ● low
217.37.121.96/29 SANTANDER RIPE ASSIGNED PA ● low
2a00:2381:f9cd::/48 SANTANDER RIPE AGGREGATED-BY-LIR ● low
2a02:206b:8010::/64 SANTANDER RIPE ASSIGNED ● low

IPv6 ranges (2)

CIDR
2a00:2381:f9cd::/48
2a02:206b:8010::/64

Network trust

what's this?
RPKI hygiene: A how networks compare →
100.0% of checked blocks have valid RPKI ROA coverage (23 of 23)
Possible discrepancies (1)

These blocks are registered to Santander but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a00:2381:f9cd::/48 /48 authorized for AS2856 — British Telecommunications Limited

NIC Handles

AS12301-MNT AS8681-MNT BTNET-MNT DUMY-RIPE DUMY-RIPE EQUINIX-FULFIL-MNT EQUINIX-MNT IP-MNT JE-TEL-MNT MAINT-AS3352 MNT-EXATEL TELENET-OPS-MNT +1 more