NumberResearchThousands-blocks in 501-204
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 501-204 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 501 blocks
Most active assignees, all time — NPA 501
New assignments by month
Sep 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2012-07-27 | 501-204-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | JESSIEVL | AR |
| 2022-08-26 | 501-204-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | JESSIEVL | AR |
| 2010-03-17 | 501-204-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JESSIEVL | AR |
| 2013-12-13 | 501-204-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR | 7277 | JESSIEVL | AR |
| 2013-12-30 | 501-204-4XXX | 4000–4999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | JESSIEVL | AR |
| 2013-12-30 | 501-204-5XXX | 5000–5999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | JESSIEVL | AR |
| 2014-05-05 | 501-204-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | JESSIEVL | AR |
| 2009-10-19 | 501-204-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AR | 802C | JESSIEVL | AR |
| 2014-07-16 | 501-204-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | JESSIEVL | AR |
| — | 501-204-9XXX | 9000–9999 | Reserved | METROPCS, INC. | 5562 | JESSIEVL | AR |
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.