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
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-05-20 | 720-532-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-05-20 | 720-532-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-05-19 | 720-389-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-05-19 | 720-746-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-05-13 | 720-675-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-292-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-292-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-292-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-292-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-982-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-982-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-982-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-987-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-987-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-05-08 | 720-989-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2009-04-28 | 720-292-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | DENVER | CO |
| 2009-04-17 | 720-624-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | DENVER | CO |
| 2009-04-16 | 720-342-0XXX | 0000–0999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-1XXX | 1000–1999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-2XXX | 2000–2999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-3XXX | 3000–3999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-4XXX | 4000–4999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-5XXX | 5000–5999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-6XXX | 6000–6999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-7XXX | 7000–7999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-8XXX | 8000–8999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-16 | 720-342-9XXX | 9000–9999 | Assigned | AT&T - LOCAL | 7421 | DENVER | CO |
| 2009-04-03 | 720-389-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-04-03 | 720-389-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-04-03 | 720-389-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-04-03 | 720-389-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | DENVER | CO |
| 2009-03-24 | 720-433-0XXX | 0000–0999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-3XXX | 3000–3999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-4XXX | 4000–4999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-5XXX | 5000–5999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-6XXX | 6000–6999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-7XXX | 7000–7999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-8XXX | 8000–8999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-24 | 720-433-9XXX | 9000–9999 | Assigned | QWEST CORPORATION | 9636 | DENVER | CO |
| 2009-03-20 | 720-421-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-2XXX | 2000–2999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2009-03-20 | 720-421-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | 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.