NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 410
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-02-12 | 410-273-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ABERDEEN | MD |
| 2015-04-06 | 410-684-8XXX | 8000–8999 | Assigned | VERIZON MARYLAND, INC. | 9212 | GLENBURNIE | MD |
| 2007-08-22 | 410-417-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2007-08-22 | 410-417-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2007-08-22 | 410-417-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2007-08-22 | 410-417-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2007-08-22 | 410-417-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2006-06-27 | 410-346-8XXX | 8000–8999 | Assigned | VERIZON MARYLAND, INC. | 9212 | SILVER RUN | MD |
| 2005-09-19 | 410-774-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | CROFTON | MD |
| 2005-07-08 | 410-470-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-5XXX | 5000–5999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-8XXX | 8000–8999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-07-08 | 410-470-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-05-12 | 410-577-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-2XXX | 2000–2999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-5XXX | 5000–5999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-8XXX | 8000–8999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-12 | 410-577-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | PIKESVILLE | MD |
| 2005-05-11 | 410-809-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BEL AIR | MD |
| 2005-03-16 | 410-858-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | ANNAPOLIS | MD |
| 2005-02-11 | 410-436-0XXX | 0000–0999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2005-02-11 | 410-436-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | EDGEWOOD | MD |
| 2004-10-07 | 410-928-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | MILLINGTON | MD |
| 2004-08-27 | 410-629-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BERLIN | MD |
| 2004-06-10 | 410-595-1XXX | 1000–1999 | Assigned | VERIZON MARYLAND, INC. | 9212 | GLENBURNIE | MD |
| 2004-05-05 | 410-970-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | SYKESVILLE | MD |
| 2003-11-17 | 410-634-9XXX | 9000–9999 | Assigned | VERIZON MARYLAND, INC. | 9212 | RIDGELY | MD |
| 2003-10-14 | 410-713-3XXX | 3000–3999 | Assigned | VERIZON MARYLAND, INC. | 9212 | SALISBURY | MD |
| 2003-08-29 | 410-735-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2003-08-12 | 410-735-6XXX | 6000–6999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2003-08-12 | 410-735-7XXX | 7000–7999 | Assigned | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2003-04-09 | 410-701-4XXX | 4000–4999 | Assigned | VERIZON MARYLAND, INC. | 9212 | RANDALLSTN | 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 |
| 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 |
| 2002-04-30 | 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 |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.