NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
2019-08-08 417-516 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 BOLIVAR MO
2019-08-08 515-461 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DES MOINES IA
2019-08-08 515-553 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DES MOINES IA
2019-08-08 561-565 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C BOCA RATON FL
2019-08-08 620-310 0XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - KS 205F ABBYVLPLVN KS
2019-08-08 620-413 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - KS 205F HUDSON KS
2019-08-08 620-470 0XXX1XXX2XXX4XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F LANGDON KS
2019-08-08 620-520 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - KS 205F KINCAID KS
2019-08-08 620-570 0XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F MORAN KS
2019-08-08 754-704 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C CORAL SPG FL
2019-08-08 754-714 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C POMPANOBCH FL
2019-08-08 779-600 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CISSNAPARK IL
2019-08-08 785-880 0XXX2XXX7XXX · 2 holders which blocks → ONVOY, LLC - KS 205F WAVERLY KS
2019-08-08 785-900 0XXX1XXX2XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - KS 205F WESTPHALIA KS
2019-08-08 808-300 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - HI 210H HILO HI
2019-08-08 941-541 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C CAPE HAZE FL
2019-08-07 213-855 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LSAN DA 10 CA
2019-08-07 224-314 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARLIGTNHTS IL
2019-08-07 267-917 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHPHSBZN40 PA
2019-08-07 361-253 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 C CHRISTI TX
2019-08-07 417-490 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F SARCOXIE MO
2019-08-07 424-437 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HAWTHORNE CA
2019-08-07 430-262 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SHERMAN TX
2019-08-07 442-309 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BARSTOW CA
2019-08-07 608-641 0XXX1XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F BENTON WI
2019-08-07 626-546 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARCADIA CA
2019-08-07 773-207 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN10 IL
2019-08-07 949-591 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 IRVINE CA
2019-08-06 202-923 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSHNGTNZN1 DC
2019-08-06 267-894 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 DOYLESTOWN PA
2019-08-06 385-349 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
2019-08-06 470-569 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA NE GA
2019-08-06 608-607 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K JANESVILLE WI
2019-08-06 925-534 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LIVERMORE CA
2019-08-05 337-455 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BREAUX BDG LA
2019-08-05 337-472 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - LA 749E MAMOU LA
2019-08-05 337-473 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAGLEY LA
2019-08-05 337-481 0XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - LA 749E STARKS LA
2019-08-05 424-436 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNMN SNMN CA
2019-08-05 430-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SULPHURSPG TX
2019-08-05 501-369 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J LITTLEROCK AR
2019-08-05 520-372 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J TUCSON AZ
2019-08-05 704-610 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E LOCUST NC
2019-08-05 904-526 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MIDDLEBURG FL
2019-08-05 936-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CONROE TX
2019-08-03 930-529 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H HAZLETON IN
2019-08-03 930-777 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H HUNTINGBG IN
2019-08-02 202-221 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2019-08-02 226-703 not yet reported which blocks → Iristel Inc. 154E Windsor —
2019-08-02 226-704 not yet reported which blocks → Iristel Inc. 154E Windsor —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.