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 304
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2019-06-27 | 304-418-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MORGANTOWN | WV |
| 2019-03-06 | 304-973-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BELMONT | WV |
| 2017-08-22 | 304-936-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WINFIELD | WV |
| 2017-02-22 | 304-758-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDDLEBORN | WV |
| 2017-02-22 | 304-803-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GASSAWAY | WV |
| 2017-02-22 | 304-902-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FRANKLIN | WV |
| 2016-11-17 | 304-470-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHILIPPI | WV |
| 2016-10-25 | 304-772-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | UNION | WV |
| 2016-09-14 | 304-427-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HILLSBORO | WV |
| 2016-06-08 | 304-956-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHSLPHRSPG | WV |
| 2016-02-09 | 304-519-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SPENCER | WV |
| 2014-02-03 | 304-741-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN1 | WV |
| 2013-12-18 | 304-689-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUTTON | WV |
| 2013-12-17 | 304-405-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WEST UNION | WV |
| 2013-05-17 | 304-306-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN7 | WV |
| 2012-11-12 | 304-409-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BLUEWELL | WV |
| 2012-11-12 | 304-557-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PRINCETON | WV |
| 2012-04-27 | 304-693-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GORMANIA | WV |
| 2012-01-06 | 304-209-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KEYSER | WV |
| 2012-01-06 | 304-240-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FALLNGWTRS | WV |
| 2011-12-08 | 304-381-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MORGANTOWN | WV |
| 2011-11-23 | 304-900-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FAYETTEVL | WV |
| 2011-11-21 | 304-398-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NEWMRTNSVL | WV |
| 2011-11-16 | 304-901-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MARTINSBG | WV |
| 2011-02-28 | 304-220-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN4 | WV |
| 2011-02-28 | 304-489-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MINERLWLLS | WV |
| 2010-12-09 | 304-988-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN2 | WV |
| 2010-09-27 | 304-635-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELKINS | WV |
| 2010-07-12 | 304-583-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MAN | WV |
| 2010-06-21 | 304-909-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WHELNGZON3 | WV |
| 2010-06-04 | 304-356-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN1 | WV |
| 2010-06-04 | 304-356-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN1 | WV |
| 2010-06-04 | 304-356-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN1 | WV |
| 2010-02-10 | 304-935-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN3 | WV |
| 2009-11-20 | 304-754-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HEDGESVL | WV |
| 2009-11-20 | 304-821-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | INWOOD | WV |
| 2009-09-14 | 304-861-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PRKRSBGZN3 | WV |
| 2009-09-09 | 304-500-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BERKELYSPG | WV |
| 2009-09-01 | 304-236-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WILLIAMSON | WV |
| 2009-09-01 | 304-307-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MADISON | WV |
| 2009-09-01 | 304-393-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | KERMIT | WV |
| 2009-09-01 | 304-397-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HURRICANE | WV |
| 2009-09-01 | 304-426-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MATEWAN | WV |
| 2009-09-01 | 304-440-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RAVENSWOOD | WV |
| 2009-09-01 | 304-514-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | RIPLEY | WV |
| 2009-09-01 | 304-520-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEWISBURG | WV |
| 2009-09-01 | 304-618-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SUMMERSVL | WV |
| 2009-09-01 | 304-664-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GILBERT | WV |
| 2009-09-01 | 304-721-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN5 | WV |
| 2009-09-01 | 304-759-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CHRLSTNZN6 | WV |
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.