NumberResearchThousands-blocks in 432-517
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 432-517 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 432 blocks
Most active assignees, all time — NPA 432
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 432-517-0XXX | 0000–0999 | Reserved | T-MOBILE USA, INC. | 6529 | BIG SPRING | TX |
| 2021-02-19 | 432-517-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BIG SPRING | TX |
| — | 432-517-2XXX | 2000–2999 | Available | BIG SPRING | TX | ||
| 2009-08-26 | 432-517-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7249 | BIG SPRING | TX |
| 2006-05-25 | 432-517-4XXX | 4000–4999 | Assigned | CEBRIDGE TELECOM TX , L.P. - TX | 318C | BIG SPRING | TX |
| 2009-11-02 | 432-517-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BIG SPRING | TX |
| 2015-03-27 | 432-517-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | BIG SPRING | TX |
| 2016-05-18 | 432-517-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | BIG SPRING | TX |
| 2010-10-20 | 432-517-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BIG SPRING | TX |
| 2007-12-06 | 432-517-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BIG SPRING | TX |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.