NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-11-15 863-316 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 LAKELAND FL
2021-11-15 901-656 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 COLLIERVL TN
2021-11-15 931-907 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H COOKEVILLE TN
2021-11-12 223-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H EPHRATA PA
2021-11-12 229-523 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H BLAKELY GA
2021-11-12 229-534 0XXX1XXX2XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BUENAVISTA GA
2021-11-12 229-562 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H MCRAE GA
2021-11-12 325-314 0XXX1XXX6XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ANSON TX
2021-11-12 325-316 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H COLORADOCY TX
2021-11-12 417-580 0XXX1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E CARL JCT MO
2021-11-12 435-306 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUREKA UT
2021-11-12 435-318 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 IBAPAH UT
2021-11-12 435-323 3XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PARKVALLEY UT
2021-11-12 478-389 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E COCHRAN GA
2021-11-12 480-817 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2021-11-12 530-819 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E COLFAX CA
2021-11-12 548-440 not yet reported which blocks → IXICA Communications Inc. 812H Kitchener-Waterloo —
2021-11-12 548-470 not yet reported which blocks → IXICA Communications Inc. 812H Hespeler —
2021-11-12 548-520 not yet reported which blocks → IXICA Communications Inc. 812H New Hamburg —
2021-11-12 548-530 not yet reported which blocks → IXICA Communications Inc. 812H Preston —
2021-11-12 548-590 not yet reported which blocks → IXICA Communications Inc. 812H Wellesley —
2021-11-12 579-520 not yet reported which blocks → IXICA Communications Inc. 812H St-Paul-D'Abbotsford —
2021-11-12 579-560 not yet reported which blocks → IXICA Communications Inc. 812H Sutton —
2021-11-12 579-580 not yet reported which blocks → IXICA Communications Inc. 812H Waterloo —
2021-11-12 602-846 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2021-11-12 602-880 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-11-12 608-601 0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F MCFARLAND WI
2021-11-12 623-279 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2021-11-12 640-216 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CRANBURY NJ
2021-11-12 640-217 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CAPMAYCTHS NJ
2021-11-12 661-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MCFARLAND CA
2021-11-12 661-581 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 PLDL PLDL CA
2021-11-12 681-396 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MARLINTON WV
2021-11-12 681-413 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HILLSBORO WV
2021-11-12 720-896 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2021-11-12 769-276 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MCCOMB MS
2021-11-12 845-874 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2021-11-12 862-390 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 NEWARK NJ
2021-11-12 908-545 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LINDEN NJ
2021-11-12 939-323 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2021-11-12 939-729 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2021-11-12 980-401 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 GASTONIA NC
2021-11-12 984-480 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H RALEIGH NC
2021-11-11 256-941 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DECATUR AL
2021-11-11 325-299 0XXX1XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H STAMFORD TX
2021-11-11 325-306 0XXX1XXX6XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ROTAN TX
2021-11-11 440-902 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ELYRIA OH
2021-11-11 806-812 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H MCLEAN TX
2021-11-11 806-813 0XXX1XXX2XXX7XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ALLISON TX
2021-11-11 945-235 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DALLAS TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.