SEI, INC.

SEI LLC
Data as of 2026-07-26
GLEIF verified
LEI
549300ENUNGKJV1XM837
Registered name
SEI, INC.
Jurisdiction
US-MI
Ultimate parent
Pamlico SEI Finance, LLC
549300VM8WHGXB4OLT24
Cluster stats
Netblocks7 · 1,096 IPv4 addresses
IPv6 1 prefix (largest 2001:4d78:743:15::/64)
Registered in Netherlands (3) · France (1) · Ireland (1) · United States (1)
All fragments 42 blocks across 13 clusters
Cluster ID214655330
RegistryARIN
Owner jurisdictionUS-MI
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 549300ENUNGKJV1XM837
Shared handles clustered on 15 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

6 weekly snapshots · JSON
7 0 netblocks since 2026-07-05
2026-07-05 peak 7 2026-07-26

IP Ranges (7)

⬇ export CSV
CIDR Org name Registry Status Confidence
81.29.197.120/29 SEI RIPE ASSIGNED PA ● low
83.167.199.80/28 SEI RIPE ASSIGNED PA ● low
86.65.157.96/29 SEI RIPE ASSIGNED PA ● low
137.191.235.64/27 SEI RIPE LEGACY ● low
208.89.80.0/22 SEI LLC ARIN DIRECT ALLOCATION ● low
212.153.190.200/29 SEI RIPE ASSIGNED PA ● low
2001:4d78:743:15::/64 SEI RIPE ASSIGNED ● low

IPv6 ranges (1)

CIDR
2001:4d78:743:15::/64

Network trust

what's this?
RPKI hygiene: C how networks compare →
71.4% of checked blocks have valid RPKI ROA coverage (5 of 7)
No discrepancies found among checked blocks.

NIC Handles

AKA61-ARIN DUMY-RIPE DUMY-RIPE EQUINIX-FULFIL-MNT EQUINIX-MNT LDCOM-MNT LDCOM-PRO-MNT MNT-IRISHGOVERNMENT NLNET-MNT SEIL-1 SNT10-ARIN SNT10-ARIN +3 more