NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

29 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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 551
ONVOY, LLC - NJ 12
NEW CINGULAR WIRELESS PCS, LLC - DC 11
CSC WIRELESS, LLC 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 3
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-09-15 551-270-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-279-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-279-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-279-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-291-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-291-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-291-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-291-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-308-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-15 551-308-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 RAMSEY NJ
2020-09-08 551-305-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIDGEWOOD NJ
2020-09-08 551-305-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RIDGEWOOD NJ
2020-09-01 551-430-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2020-09-01 551-430-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2020-09-01 551-430-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 JERSEYCITY NJ
2020-08-19 551-381-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RUTHERFORD NJ
2020-08-19 551-381-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RUTHERFORD NJ
2020-08-19 551-381-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RUTHERFORD NJ
2020-08-13 551-310-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F WESTWOOD NJ
2020-08-13 551-501-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - NJ 118F ENGLEWOOD NJ
2020-08-11 551-307-8XXX 8000–8999Assigned METROPCS, INC. 5562 JERSEYCITY NJ
2020-08-11 551-307-9XXX 9000–9999Assigned METROPCS, INC. 5562 JERSEYCITY NJ
2020-08-11 551-529-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NJ 4804 UNION CITY NJ
2020-07-30 551-271-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2020-07-30 551-271-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2020-07-29 551-302-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2020-07-29 551-302-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2020-07-23 551-321-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C PARK RIDGE NJ
2020-07-23 551-321-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C PARK RIDGE NJ
2020-07-23 551-381-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C RUTHERFORD NJ
2020-07-23 551-381-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C RUTHERFORD NJ
2020-07-21 551-299-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D FAIR LAWN NJ
2020-07-21 551-299-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D FAIR LAWN NJ
2020-07-21 551-314-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D CLIFFSIDE NJ
2020-07-21 551-314-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D CLIFFSIDE NJ
2020-07-20 551-210-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C DUMONT NJ
2020-07-20 551-210-4XXX 4000–4999Assigned ONVOY, LLC - NJ 637C DUMONT NJ
2020-07-20 551-239-8XXX 8000–8999Assigned ONVOY, LLC - NJ 637C CLIFFSIDE NJ
2020-07-20 551-239-9XXX 9000–9999Assigned ONVOY, LLC - NJ 637C CLIFFSIDE NJ
2020-07-20 551-266-4XXX 4000–4999Assigned ONVOY, LLC - NJ 637C FAIR LAWN NJ
2020-07-20 551-266-5XXX 5000–5999Assigned ONVOY, LLC - NJ 637C FAIR LAWN NJ
2020-07-20 551-291-1XXX 1000–1999Assigned ONVOY, LLC - NJ 637C RAMSEY NJ
2020-07-20 551-291-2XXX 2000–2999Assigned ONVOY, LLC - NJ 637C RAMSEY NJ
2020-07-20 551-296-5XXX 5000–5999Assigned ONVOY, LLC - NJ 637C OAKLAND NJ
2020-07-20 551-296-7XXX 7000–7999Assigned ONVOY, LLC - NJ 637C OAKLAND NJ
2020-07-20 551-302-3XXX 3000–3999Assigned ONVOY, LLC - NJ 637C HACKENSACK NJ
2020-07-20 551-303-6XXX 6000–6999Assigned ONVOY, LLC - NJ 637C CLOSTER NJ
2020-07-20 551-303-7XXX 7000–7999Assigned ONVOY, LLC - NJ 637C CLOSTER NJ
2020-07-20 551-304-7XXX 7000–7999Assigned ONVOY, LLC - NJ 637C RUTHERFORD NJ
2020-07-20 551-305-3XXX 3000–3999Assigned ONVOY, LLC - NJ 637C RIDGEWOOD NJ

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.