21ST MORTGAGE CORPORATION

21st Mortgage Corporation
Data as of 2026-08-16
GLEIF verified
Complete entity footprint
10 linked clusters · 94 netblocks · 20,448 IPv4 addresses · 25 IPv6 prefixes
This organisation's clusters combined by evidence — shared GLEIF corporate family — not name similarity, so genuinely different organisations that share a name are excluded.
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LEI
549300XQVJ1XBNFA5536
Registered name
21ST MORTGAGE CORPORATION
Jurisdiction
US-DE
Ultimate parent
BERKSHIRE HATHAWAY INC.
5493000C01ZX7D35SD85
Cluster stats
Netblocks1 · 256 IPv4 addresses
Cluster ID225225749
RegistryARIN
Owner jurisdictionUS-DE
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 549300XQVJ1XBNFA5536
Shared handles clustered on 4 shared RIR contact/maintainer handles
Registry names 1 distinct registrant name across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (1)

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CIDR Org name Registry Status Confidence
74.80.145.0/24 21st Mortgage Corporation ARIN DIRECT ALLOCATION ● high

Corporate group (10 confirmed entities)

NIC Handles

KJM38-ARIN KJM38-ARIN KJM38-ARIN SMC-559