NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/24/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
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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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-03-14 | 253-532-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2022-02-14 | 253-354-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2021-09-28 | 253-374-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2019-10-03 | 253-393-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2018-11-06 | 253-251-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | PUYALLUP | WA |
| 2018-09-25 | 253-993-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMAWVLY | WA |
| 2018-04-06 | 253-525-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GIG HARBOR | WA |
| 2016-07-12 | 253-321-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | SUMNER | WA |
| 2016-06-13 | 253-240-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2015-05-18 | 253-844-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2014-12-23 | 253-258-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2014-04-22 | 253-244-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2013-02-15 | 253-733-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | DES MOINES | WA |
| 2012-08-30 | 253-256-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | PUYALLUP | WA |
| 2012-04-27 | 253-442-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2012-04-18 | 253-733-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | DES MOINES | WA |
| 2012-02-21 | 253-442-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2010-05-11 | 253-220-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KENT | WA |
| 2009-12-21 | 253-561-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2009-06-11 | 253-397-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2009-02-17 | 253-267-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2009-02-17 | 253-363-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2008-10-03 | 253-220-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KENT | WA |
| 2007-11-14 | 253-398-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | KENT | WA |
| 2007-10-19 | 253-292-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMA | WA |
| 2007-09-26 | 253-320-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2007-03-22 | 253-271-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | GRAHAM | WA |
| 2007-02-22 | 253-733-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | DES MOINES | WA |
| 2007-01-23 | 253-269-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2006-12-06 | 253-320-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2006-11-16 | 253-881-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | PUYALLUP | WA |
| 2006-10-06 | 253-655-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | GRAHAM | WA |
| 2006-09-14 | 253-220-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KENT | WA |
| 2006-09-14 | 253-234-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KENT | WA |
| 2006-05-15 | 253-302-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2006-05-15 | 253-617-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2005-11-23 | 253-321-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | SUMNER | WA |
| 2005-09-15 | 253-315-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2005-09-15 | 253-315-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2005-09-15 | 253-315-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2005-09-15 | 253-486-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | AUBURN | WA |
| 2005-06-21 | 253-590-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2005-06-21 | 253-590-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2005-06-21 | 253-882-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TACOMA | WA |
| 2005-06-21 | 253-883-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMAWVLY | WA |
| 2005-06-21 | 253-883-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMAWVLY | WA |
| 2005-06-21 | 253-883-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMAWVLY | WA |
| 2005-06-21 | 253-883-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | TACOMAWVLY | WA |
| 2004-02-20 | 253-200-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | PUYALLUP | WA |
| 2004-02-20 | 253-299-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA | 7274 | SUMNER | WA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.