NumberResearchThousands-blocks in 501-422
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 501-422 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-08-23 | 501-422-0XXX | 0000–0999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | CABOT | AR |
| 2010-07-29 | 501-422-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | CABOT | AR |
| 2014-03-25 | 501-422-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | CABOT | AR |
| 2014-03-25 | 501-422-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | CABOT | AR |
| 2014-11-24 | 501-422-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CABOT | AR |
| 2016-01-08 | 501-422-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - AR | 802C | CABOT | AR |
| 2015-08-11 | 501-422-6XXX | 6000–6999 | Assigned | E. RITTER COMMUNICATIONS, LLC | 128L | CABOT | AR |
| 2014-11-06 | 501-422-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CABOT | AR |
| 2011-10-28 | 501-422-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CABOT | AR |
| 2010-02-16 | 501-422-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | CABOT | 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.