NumberResearchThousands-blocks in 253-525
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 253-525 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 253 blocks
Most active assignees, all time — NPA 253
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-08-22 | 253-525-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | GIG HARBOR | WA |
| 2019-06-21 | 253-525-1XXX | 1000–1999 | Assigned | ONVOY, LLC - WA | 483E | GIG HARBOR | WA |
| 2019-06-21 | 253-525-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WA | 483E | GIG HARBOR | WA |
| 2018-04-06 | 253-525-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GIG HARBOR | WA |
| 2018-06-15 | 253-525-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WA | 6121 | GIG HARBOR | WA |
| 2019-01-08 | 253-525-5XXX | 5000–5999 | Assigned | ONVOY, LLC - WA | 483E | GIG HARBOR | WA |
| 2020-01-16 | 253-525-6XXX | 6000–6999 | Assigned | ONVOY, LLC - WA | 483E | GIG HARBOR | WA |
| 2020-07-01 | 253-525-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | GIG HARBOR | WA |
| 2022-08-24 | 253-525-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WA | 483E | GIG HARBOR | WA |
| 2023-04-14 | 253-525-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA | 5812 | GIG HARBOR | WA |
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.