NumberResearchRecent thousands-block assignments
0 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, all time — NPA 571
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-09-29 | 571-349-3XXX | 3000–3999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | ARCOLA | VA |
| 2013-08-30 | 571-284-1XXX | 1000–1999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2013-08-30 | 571-284-2XXX | 2000–2999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2013-08-30 | 571-284-3XXX | 3000–3999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2013-08-30 | 571-284-4XXX | 4000–4999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2011-09-16 | 571-367-4XXX | 4000–4999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | ARCOLA | VA |
| 2009-12-23 | 571-494-4XXX | 4000–4999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | TRIANGLE | VA |
| 2009-04-30 | 571-402-3XXX | 3000–3999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | DALE CITY | VA |
| 2008-09-03 | 571-377-6XXX | 6000–6999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | MANASSAS | VA |
| 2008-09-03 | 571-377-7XXX | 7000–7999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | MANASSAS | VA |
| 2005-12-22 | 571-248-6XXX | 6000–6999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2005-01-11 | 571-248-4XXX | 4000–4999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2004-07-30 | 571-248-8XXX | 8000–8999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2003-05-27 | 571-261-4XXX | 4000–4999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2003-05-27 | 571-261-5XXX | 5000–5999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2002-12-02 | 571-261-3XXX | 3000–3999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2002-10-23 | 571-261-2XXX | 2000–2999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
| 2002-06-05 | 571-261-1XXX | 1000–1999 | Assigned | VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | HAYMARKET | VA |
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.