NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026
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 203
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 |
|---|---|---|---|---|---|---|---|
| 2014-09-18 | 203-769-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7316 | GREENWICH | CT |
| 2014-03-14 | 203-290-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2012-08-22 | 203-423-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | WILTON | CT |
| 2011-02-25 | 203-212-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-10-09 | 203-995-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2008-09-08 | 203-347-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7316 | BYRAM | CT |
| 2008-09-08 | 203-930-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7316 | GREENWICH | CT |
| 2008-08-22 | 203-897-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-08-22 | 203-897-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2008-02-20 | 203-992-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | GREENWICH | CT |
| 2008-02-20 | 203-992-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | GREENWICH | CT |
| 2007-10-23 | 203-873-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-10-23 | 203-873-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-10-23 | 203-873-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-10-23 | 203-873-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-06-08 | 203-296-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-06-08 | 203-296-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-06-08 | 203-296-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-06-08 | 203-296-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | BRIDGEPORT | CT |
| 2007-06-04 | 203-742-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | GREENWICH | CT |
| 2007-02-13 | 203-990-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | OLDGRNWICH | CT |
| 2007-01-03 | 203-742-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | GREENWICH | CT |
| 2006-11-28 | 203-728-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2006-11-28 | 203-728-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | STAMFORD | CT |
| 2006-06-13 | 203-742-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | GREENWICH | CT |
| 2005-02-07 | 203-307-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | FAIRFIELD | CT |
| 2005-02-07 | 203-307-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | FAIRFIELD | CT |
| 2005-02-07 | 203-307-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | FAIRFIELD | CT |
| 2005-02-07 | 203-307-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | FAIRFIELD | CT |
| 2005-02-07 | 203-898-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2005-02-07 | 203-898-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2005-02-07 | 203-898-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
| 2005-02-07 | 203-898-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | DARIEN | CT |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.