NumberResearchRecent thousands-block assignments
2 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 410
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 |
|---|---|---|---|---|---|---|---|
| 2003-02-03 | 410-774-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | CROFTON | MD |
| 2003-02-03 | 410-782-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | ELKRIDGE | MD |
| 2003-02-03 | 410-793-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | SEVERNA PK | MD |
| 2003-01-27 | 410-505-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | ELLICOTTCY | MD |
| 2003-01-27 | 410-670-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | EDGEWOOD | MD |
| 2003-01-27 | 410-753-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | PIKESVILLE | MD |
| 2003-01-24 | 410-845-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | SALISBURY | MD |
| 2003-01-09 | 410-505-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ELLICOTTCY | MD |
| 2003-01-08 | 410-330-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | CAMBRIDGE | MD |
| 2003-01-08 | 410-736-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-736-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-736-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-736-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-736-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-736-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-949-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-949-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-949-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2003-01-08 | 410-949-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BALTIMORE | MD |
| 2002-11-26 | 410-330-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | CAMBRIDGE | MD |
| 2002-11-15 | 410-506-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ELKTON | MD |
| 2002-11-15 | 410-506-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ELKTON | MD |
| 2002-11-15 | 410-506-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ELKTON | MD |
| 2002-11-06 | 410-372-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | TOWSON | MD |
| 2002-11-06 | 410-384-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | SEVERNA PK | MD |
| 2002-08-25 | 410-713-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | SALISBURY | MD |
| 2002-07-01 | 410-505-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | ELLICOTTCY | MD |
| 2002-05-23 | 410-690-9XXX | 9000–9999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | EASTON | MD |
| 2002-04-30 | 410-401-2XXX | 2000–2999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MD | 7325 | BRYNPKLNCM | MD |
| 2002-04-30 | 410-621-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PRINCEANNE | MD |
| 2002-04-30 | 410-621-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PRINCEANNE | MD |
| 2002-04-30 | 410-621-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PRINCEANNE | MD |
| 2002-03-11 | 410-567-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MD | 6119 | ELKRIDGE | MD |
| 2002-02-13 | 410-516-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2002-01-30 | 410-940-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | ANNAPOLIS | 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.