NumberResearchThousands-blocks in 336-489
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 336-489 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 336 blocks
Most active assignees, all time — NPA 336
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2006-05-24 | 336-489-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WJEFFERSON | NC |
| 2017-11-16 | 336-489-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WJEFFERSON | NC |
| 2021-02-04 | 336-489-2XXX | 2000–2999 | Assigned | TELNYX LLC | 073H | WJEFFERSON | NC |
| 2011-04-14 | 336-489-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | WJEFFERSON | NC |
| 2018-08-27 | 336-489-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NC | 638E | WJEFFERSON | NC |
| 2021-03-02 | 336-489-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NC | 638E | WJEFFERSON | NC |
| 2017-04-06 | 336-489-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NC | 8389 | WJEFFERSON | NC |
| 2014-01-30 | 336-489-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | WJEFFERSON | NC |
| 2019-03-06 | 336-489-8XXX | 8000–8999 | Assigned | ONVOY, LLC - NC | 638E | WJEFFERSON | NC |
| 2019-03-06 | 336-489-9XXX | 9000–9999 | Assigned | ONVOY, LLC - NC | 638E | WJEFFERSON | NC |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.