NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-09-22 343-414 not yet reported which blocks → TekSavvy Solutions Inc 548H Madoc —
2021-09-22 343-415 not yet reported which blocks → TekSavvy Solutions Inc 548H Gilmour —
2021-09-22 343-416 not yet reported which blocks → TekSavvy Solutions Inc 548H Marmora —
2021-09-22 343-418 not yet reported which blocks → TekSavvy Solutions Inc 548H Maynooth —
2021-09-22 343-419 not yet reported which blocks → TekSavvy Solutions Inc 548H Northbrook —
2021-09-22 343-420 not yet reported which blocks → TekSavvy Solutions Inc 548H Picton —
2021-09-22 343-421 not yet reported which blocks → TekSavvy Solutions Inc 548H Plevna —
2021-09-22 346-508 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SATSUMA TX
2021-09-22 419-415 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LIMA OH
2021-09-22 425-469 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 445-237 0–9 XXXall 10 · 3 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 PHLDLPHZN2 PA
2021-09-22 447-449 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 DANVILLE IL
2021-09-22 539-258 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUFFALOVLY OK
2021-09-22 548-256 not yet reported which blocks → Fibernetics Corporation 464D Orangeville —
2021-09-22 574-388 0XXX2XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - IN 097D LAPAZ IN
2021-09-22 619-967 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-09-22 650-629 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SAN MATEO CA
2021-09-22 661-550 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BIG BUTTE CA
2021-09-22 680-848 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C MACEDON NY
2021-09-22 747-316 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-09-22 747-348 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CANOGAPARK CA
2021-09-22 747-577 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H RESEDA CA
2021-09-22 765-696 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D ANDERSON IN
2021-09-22 820-822 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H OXNARD CA
2021-09-22 858-355 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNDG SNDG CA
2021-09-22 951-627 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PERRIS CA
2021-09-21 248-315 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TROY MI
2021-09-21 332-288 0–9 XXXall 10 · 3 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 NWYRCYZN01 NY
2021-09-21 424-857 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SNMN MRVS CA
2021-09-21 424-955 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CMTN CMTN CA
2021-09-21 434-287 0–9 XXXall 10 · 3 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 PALMYRA VA
2021-09-21 434-412 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 ARVONIA VA
2021-09-21 442-566 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H VALLEY CTR CA
2021-09-21 442-567 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H ESCONDIDO CA
2021-09-21 442-867 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BARSTOW CA
2021-09-21 445-216 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2021-09-21 530-857 1XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J CHICO CA
2021-09-21 609-715 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J SOMERS PT NJ
2021-09-21 689-257 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 ORLANDO FL
2021-09-21 813-894 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPASTH FL
2021-09-21 934-642 0–9 XXXall 10 · 4 holders which blocks → CORETEL NEW YORK, INC. - NY 1215 AMITYVILLE NY
2021-09-20 239-373 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FTMYERSBCH FL
2021-09-20 254-450 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 MARLIN TX
2021-09-20 256-930 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2021-09-20 256-934 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J HUNTSVILLE AL
2021-09-20 309-902 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - IL 6265 PEKIN IL
2021-09-20 346-507 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANGHAMCRK TX
2021-09-20 352-936 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D CLERMONT FL
2021-09-20 412-240 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J PTTSBGZON1 PA
2021-09-20 580-601 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BATTIEST OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.