NumberResearchRecent thousands-block assignments
5 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, last 30 days — NPA 240
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 |
|---|---|---|---|---|---|---|---|
| 2007-06-26 | 240-412-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | WALDORF | MD |
| 2007-06-26 | 240-412-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | WALDORF | MD |
| 2007-06-21 | 240-575-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | FREDERICK | MD |
| 2007-06-21 | 240-667-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSHNGTNZN4 | MD |
| 2007-06-21 | 240-669-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNGTNZN11 | MD |
| 2007-06-21 | 240-747-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNGTNZN11 | MD |
| 2007-06-20 | 240-314-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2007-06-20 | 240-486-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNG236Z14 | MD |
| 2007-06-19 | 240-493-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN6 | MD |
| 2007-06-12 | 240-241-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNG236Z13 | MD |
| 2007-06-12 | 240-241-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNG236Z13 | MD |
| 2007-06-12 | 240-383-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN2 | MD |
| 2007-06-12 | 240-383-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSHNGTNZN2 | MD |
| 2007-06-11 | 240-455-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN5 | MD |
| 2007-06-11 | 240-455-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSHNGTNZN5 | MD |
| 2007-06-06 | 240-577-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEONARDTN | MD |
| 2007-06-04 | 240-357-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | FREDERICK | MD |
| 2007-05-18 | 240-575-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | FREDERICK | MD |
| 2007-05-11 | 240-751-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | GAITHERSBG | MD |
| 2007-05-10 | 240-826-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-5XXX | 5000–5999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-8XXX | 8000–8999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-10 | 240-826-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | WSNGTNZN10 | MD |
| 2007-05-09 | 240-294-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | LAUREL236 | MD |
| 2007-05-08 | 240-560-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNGTNZN12 | MD |
| 2007-05-03 | 240-520-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HAGERSTOWN | MD |
| 2007-05-02 | 240-357-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | FREDERICK | MD |
| 2007-05-02 | 240-357-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | FREDERICK | MD |
| 2007-05-02 | 240-565-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL238 | MD |
| 2007-05-02 | 240-577-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2007-04-30 | 240-691-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN5 | MD |
| 2007-04-30 | 240-691-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN5 | MD |
| 2007-04-20 | 240-245-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNG236Z14 | MD |
| 2007-04-19 | 240-696-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSHNGTNZN4 | MD |
| 2007-04-17 | 240-727-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CUMBERLAND | MD |
| 2007-04-13 | 240-264-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | LAUREL236 | MD |
| 2007-04-09 | 240-750-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | GAITHERSBG | MD |
| 2007-04-09 | 240-750-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | GAITHERSBG | MD |
| 2007-04-04 | 240-429-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN3 | MD |
| 2007-04-04 | 240-429-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN3 | MD |
| 2007-04-04 | 240-429-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN3 | MD |
| 2007-04-04 | 240-429-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN3 | MD |
| 2007-04-04 | 240-577-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2007-04-03 | 240-586-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | FREDERICK | MD |
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.