NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 720
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-03-20 | 720-421-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-05 | 720-292-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-02-27 | 720-362-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-02-27 | 720-383-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FORTLUPTON | CO |
| 2009-02-18 | 720-337-0XXX | 0000–0999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-18 | 720-337-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-02-02 | 720-209-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-30 | 720-285-1XXX | 1000–1999 | Assigned | XO COLORADO, LLC | 8980 | DENVER | CO |
| 2009-01-30 | 720-285-2XXX | 2000–2999 | Assigned | XO COLORADO, LLC | 8980 | DENVER | CO |
| 2009-01-30 | 720-285-3XXX | 3000–3999 | Assigned | XO COLORADO, LLC | 8980 | DENVER | CO |
| 2009-01-30 | 720-285-4XXX | 4000–4999 | Assigned | XO COLORADO, LLC | 8980 | DENVER | CO |
| 2009-01-27 | 720-282-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-282-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-282-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-282-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-362-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-362-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-362-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-362-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-862-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-862-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-27 | 720-884-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DENVER | CO |
| 2009-01-21 | 720-951-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | DENVER | CO |
| 2009-01-16 | 720-242-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-01-16 | 720-242-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-01-16 | 720-242-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-01-16 | 720-242-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-01-16 | 720-475-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-01-14 | 720-401-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-14 | 720-401-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-01-08 | 720-975-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2008-12-23 | 720-438-2XXX | 2000–2999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 3467 | LONGMONT | CO |
| 2008-12-08 | 720-242-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2008-11-19 | 720-266-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | DENVER | CO |
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.