NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-01-12 771-201 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2022-01-12 854-232 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HILTONHEAD SC
2022-01-12 858-742 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNDG LVTA CA
2022-01-12 931-357 0–9 XXXall 10 · 2 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 BAXTER TN
2022-01-11 220-223 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CHESHIRCTR OH
2022-01-11 223-274 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 MCONELLSBG PA
2022-01-11 223-763 0XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GAP PA
2022-01-11 229-284 0–9 XXXall 10 · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J VALDOSTA GA
2022-01-11 234-643 2XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BURBANK OH
2022-01-11 240-909 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LAUREL236 MD
2022-01-11 240-914 8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HIGHFIELD MD
2022-01-11 260-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 LAGRANGE IN
2022-01-11 260-294 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 AUBURN IN
2022-01-11 269-526 3XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BANFIELD MI
2022-01-11 269-667 3XXX which blocks → TON80 COMMUNICATIONS, LLC 516J COLON MI
2022-01-11 269-675 0XXX1XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALLEGAN MI
2022-01-11 269-748 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRIDGMAN MI
2022-01-11 272-353 3XXX7XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROSEVILLE PA
2022-01-11 272-568 3XXX4XXX5XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HARVEYS LK PA
2022-01-11 272-638 0XXX2XXX5XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CTR MORELD PA
2022-01-11 308-896 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J CAIRO NE
2022-01-11 309-907 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MOLINE IL
2022-01-11 314-947 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F MEHLVILLE MO
2022-01-11 314-948 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MO 093F SAPPINGTON MO
2022-01-11 442-446 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CALIFORNCY CA
2022-01-11 445-542 0XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HARLEYSVL PA
2022-01-11 445-837 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PLUMSTEDVL PA
2022-01-11 464-202 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2022-01-11 484-267 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - PA 547E SLATINGTON PA
2022-01-11 502-866 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MTWASHIGTN KY
2022-01-11 506-441 not yet reported which blocks → Bell Mobility Aliant 329A Moncton —
2022-01-11 513-450 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C OXFORD OH
2022-01-11 516-440 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN01 NY
2022-01-11 517-837 2XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TECUMSEH MI
2022-01-11 534-363 0XXX3XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANTON WI
2022-01-11 534-768 1XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AMBERG WI
2022-01-11 534-787 0XXX3XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MATTOON WI
2022-01-11 534-794 0XXX1XXX2XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MOSINEE WI
2022-01-11 534-837 4XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CRANDON WI
2022-01-11 540-203 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E CHANCELLOR VA
2022-01-11 540-876 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E CHRISTISBG VA
2022-01-11 548-370 not yet reported which blocks → Fibernetics Corporation 464D Blenheim —
2022-01-11 548-371 not yet reported which blocks → Fibernetics Corporation 464D Bothwell —
2022-01-11 548-372 not yet reported which blocks → Fibernetics Corporation 464D Dresden —
2022-01-11 548-373 not yet reported which blocks → Fibernetics Corporation 464D Highgate —
2022-01-11 548-374 not yet reported which blocks → Fibernetics Corporation 464D Merlin —
2022-01-11 561-794 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C PAHOKEE FL
2022-01-11 561-816 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C DELRAY BCH FL
2022-01-11 561-817 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DELRAY BCH FL
2022-01-11 567-291 0XXX1XXX8XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J REDHAW OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.