NumberResearchRecent thousands-block assignments
1 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, last 30 days — NPA 301
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 |
|---|---|---|---|---|---|---|---|
| 2008-04-02 | 301-997-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2008-04-01 | 301-388-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | WSNGTNZN12 | MD |
| 2008-03-24 | 301-979-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2008-03-24 | 301-979-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2008-03-14 | 301-281-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN6 | MD |
| 2008-03-14 | 301-433-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN5 | MD |
| 2008-03-05 | 301-997-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2008-03-04 | 301-997-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2008-03-03 | 301-298-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNG236Z15 | MD |
| 2008-02-28 | 301-547-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSHNGTNZN2 | MD |
| 2008-02-28 | 301-828-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSHNGTNZN2 | MD |
| 2008-02-19 | 301-327-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNG238Z15 | MD |
| 2008-02-14 | 301-327-9XXX | 9000–9999 | Assigned | YMAX COMMUNICATIONS CORP. - MD | 281E | WSNG238Z15 | MD |
| 2008-02-08 | 301-272-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSHNGTNZN2 | MD |
| 2008-02-08 | 301-272-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSHNGTNZN2 | MD |
| 2008-02-07 | 301-659-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | WALDORF | MD |
| 2008-02-05 | 301-525-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | GAITHERSBG | MD |
| 2008-02-05 | 301-525-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | GAITHERSBG | MD |
| 2008-02-05 | 301-789-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN4 | MD |
| 2008-02-05 | 301-832-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN4 | MD |
| 2008-02-05 | 301-974-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL236 | MD |
| 2008-02-05 | 301-974-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL236 | MD |
| 2008-02-05 | 301-974-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL236 | MD |
| 2008-02-05 | 301-997-7XXX | 7000–7999 | Assigned | CORE COMMUNICATIONS, INC.- MD | 2593 | LEONARDTN | MD |
| 2008-02-01 | 301-533-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | OAKLAND | MD |
| 2008-01-29 | 301-795-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN10 | MD |
| 2008-01-23 | 301-850-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNG236Z14 | MD |
| 2008-01-22 | 301-862-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | LXTNPKGRML | MD |
| 2008-01-08 | 301-533-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | OAKLAND | MD |
| 2008-01-08 | 301-539-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | LA PLATA | MD |
| 2008-01-08 | 301-917-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2008-01-08 | 301-917-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN10 | MD |
| 2007-12-27 | 301-997-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LEONARDTN | MD |
| 2007-12-13 | 301-433-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN5 | MD |
| 2007-12-03 | 301-473-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | FREDERICK | MD |
| 2007-12-03 | 301-473-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | FREDERICK | MD |
| 2007-12-03 | 301-473-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | FREDERICK | MD |
| 2007-11-29 | 301-539-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | LA PLATA | MD |
| 2007-11-26 | 301-338-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CUMBERLAND | MD |
| 2007-11-21 | 301-917-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSNGTNZN10 | MD |
| 2007-11-20 | 301-563-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WSHNGTNZN3 | MD |
| 2007-11-20 | 301-710-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | WALDORF | MD |
| 2007-11-14 | 301-327-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD | 7228 | WSNG238Z15 | MD |
| 2007-11-14 | 301-880-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | LXTNPKGRML | MD |
| 2007-11-09 | 301-586-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN3 | MD |
| 2007-11-09 | 301-586-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN3 | MD |
| 2007-11-09 | 301-586-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | WSHNGTNZN3 | MD |
| 2007-11-09 | 301-628-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN3 | MD |
| 2007-11-09 | 301-628-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN3 | MD |
| 2007-11-09 | 301-628-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN3 | MD |
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.