NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 843
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-12-14 | 843-984-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | MTPLEASANT | SC |
| 2019-10-07 | 843-942-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | FLORENCE | SC |
| 2017-05-18 | 843-941-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | BEAUFORT | SC |
| 2017-04-07 | 843-996-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2016-05-23 | 843-474-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | LAUREL BAY | SC |
| 2016-05-03 | 843-806-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2016-03-16 | 843-268-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | LAKE VIEW | SC |
| 2016-03-16 | 843-306-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | CLIO | SC |
| 2016-02-24 | 843-400-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | MCCOLL | SC |
| 2016-02-24 | 843-561-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | MULLINS | SC |
| 2016-02-24 | 843-595-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | NICHOLS | SC |
| 2016-02-05 | 843-701-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | ST GEORGE | SC |
| 2015-10-29 | 843-945-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | MYRTLE BCH | SC |
| 2015-09-23 | 843-800-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | MTPLEASANT | SC |
| 2015-08-19 | 843-872-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2015-03-31 | 843-481-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | KINGSTREE | SC |
| 2014-11-10 | 843-800-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | MTPLEASANT | SC |
| 2014-05-21 | 843-456-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | BENNETTSVL | SC |
| 2014-03-19 | 843-481-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | KINGSTREE | SC |
| 2013-08-21 | 843-779-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2012-02-10 | 843-401-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | KINGSTREE | SC |
| 2012-01-04 | 843-632-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | DILLON | SC |
| 2011-12-14 | 843-480-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2011-01-10 | 843-865-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | CHERAW | SC |
| 2011-01-10 | 843-874-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | MARION | SC |
| 2010-08-10 | 843-405-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2010-03-02 | 843-309-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | HARTSVILLE | SC |
| 2009-02-10 | 843-885-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | ISLE PALMS | SC |
| 2008-05-06 | 843-614-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | CHARLESTON | SC |
| 2007-02-09 | 843-473-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | BEAUFORT | SC |
| 2007-02-09 | 843-972-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | MTPLEASANT | SC |
| 2007-01-25 | 843-486-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | SUMMERVL | SC |
| 2005-11-21 | 843-213-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | MYRTLE BCH | SC |
| 2005-11-01 | 843-486-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | SUMMERVL | SC |
| 2005-10-21 | 843-773-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | FLORENCE | SC |
| 2005-10-21 | 843-773-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | FLORENCE | SC |
| 2005-10-18 | 843-486-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | SUMMERVL | SC |
| 2005-08-29 | 843-486-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | SUMMERVL | SC |
| 2005-04-14 | 843-773-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | FLORENCE | SC |
| 2005-02-24 | 843-733-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | CONWAY | SC |
| 2005-02-22 | 843-933-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | HEMINGWAY | SC |
| 2004-12-17 | 843-264-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | ANDREWS | SC |
| 2004-09-01 | 843-235-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | PAWLEYS IS | SC |
| 2004-09-01 | 843-401-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | KINGSTREE | SC |
| 2004-08-24 | 843-486-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 288B | SUMMERVL | SC |
| 2004-08-23 | 843-281-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | NMYRTLEBCH | SC |
| 2004-08-23 | 843-380-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | JOHNSONVL | SC |
| 2004-08-23 | 843-420-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | TIMMONSVL | SC |
| 2004-08-23 | 843-699-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | LAKE CITY | SC |
| 2004-08-23 | 843-904-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | GEORGETOWN | SC |
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.