NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2017-03-14 806-547 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C FRITCH TX
2017-03-14 806-586 0XXX1XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C MOBEETIE TX
2017-03-14 939-428 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2017-03-14 970-698 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 FT COLLINS CO
2017-03-14 971-288 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H PORTLAND OR
2017-03-13 205-848 0–9 XXXall 10 · 7 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 BIRMINGHAM AL
2017-03-13 206-751 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 309-869 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELNYX LLC 073H LEWISTOWN IL
2017-03-13 331-233 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H DOWNERSGRV IL
2017-03-13 351-322 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LOWELL MA
2017-03-13 405-931 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 MIDWEST CY OK
2017-03-13 458-221 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
2017-03-13 470-382 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2017-03-13 502-501 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BARDSTOWN KY
2017-03-13 502-858 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H BLOOMFIELD KY
2017-03-13 551-217 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 RAMSEY NJ
2017-03-13 579-287 not yet reported which blocks → TELUS Quebec 2243 Berthierville —
2017-03-13 579-289 not yet reported which blocks → TELUS Quebec 2243 Lavaltrie —
2017-03-13 579-290 not yet reported which blocks → TELUS Quebec 2243 Rawdon —
2017-03-13 579-291 not yet reported which blocks → TELUS Quebec 2243 Crabtree —
2017-03-13 579-292 not yet reported which blocks → TELUS Quebec 2243 Le Gardeur —
2017-03-13 579-293 not yet reported which blocks → TELUS Quebec 2243 Lanoraie —
2017-03-13 579-294 not yet reported which blocks → TELUS Quebec 2243 L'Epiphanie-l'Assomption —
2017-03-13 579-374 not yet reported which blocks → Videotron Ltd. 8306 Pierreville —
2017-03-13 669-287 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SNJS WEST CA
2017-03-13 762-337 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 WRENS GA
2017-03-13 909-768 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CALIMESA CA
2017-03-13 910-661 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H BURGAW NC
2017-03-13 920-308 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 FTATKINSON WI
2017-03-13 954-595 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2017-03-13 971-287 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MCMINNVL OR
2017-03-13 984-299 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H CARY-RTP NC
2017-03-13 984-369 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H CHAPELHILL NC
2017-03-11 570-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 THOMPSON PA
2017-03-10 234-215 0–9 XXXall 10 · 6 holders which blocks → XO OHIO, INC. 7520 CANTON OH
2017-03-10 234-241 0–9 XXXall 10 · 5 holders which blocks → XO OHIO, INC. 7520 YOUNGSTOWN OH
2017-03-10 234-999 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H CANTON OH
2017-03-10 346-254 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2017-03-10 440-583 0–9 XXXall 10 · 6 holders which blocks → XO OHIO, INC. 7520 BEDFORD OH
2017-03-10 463-221 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 INDIANAPLS IN
2017-03-10 463-224 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2017-03-10 506-285 not yet reported which blocks → Bragg Communications Inc. 421G Saint John —
2017-03-10 506-304 not yet reported which blocks → Bragg Communications Inc. 421G Fredericton —
2017-03-10 506-371 not yet reported which blocks → Bragg Communications Inc. 4878 Fredericton —
2017-03-10 506-464 not yet reported which blocks → Bragg Communications Inc. 4878 Saint John —
2017-03-10 513-525 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 HAMILTON OH
2017-03-10 567-999 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H NEW RIEGEL OH
2017-03-10 585-405 0–9 XXXall 10 · 5 holders which blocks → XO NEW YORK, INC. 8340 ROCHESTER NY
2017-03-10 669-286 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 MORGANHILL CA
2017-03-10 716-388 0–9 XXXall 10 · 3 holders which blocks → XO NEW YORK, INC. 8340 BUFFALO NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.