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
2016-07-01 978-588 0–9 XXXall 10 · 4 holders which blocks → VERIZON NEW ENGLAND INC. 9102 AYER MA
2016-06-30 236-434 not yet reported which blocks → TELUS 8086 Masset —
2016-06-30 248-934 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PONTIAC MI
2016-06-30 248-983 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C HOLLY MI
2016-06-30 249-495 not yet reported which blocks → Iristel Inc. 154E Barrie —
2016-06-30 540-418 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BLACKSBURG VA
2016-06-30 548-800 not yet reported which blocks → Iristel Inc. 154E Brantford —
2016-06-30 615-821 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SMYRNA TN
2016-06-30 616-625 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CONKLIN MI
2016-06-30 778-744 not yet reported which blocks → Iristel Inc. 154E Nanaimo —
2016-06-30 873-771 not yet reported which blocks → Iristel Inc. 154E Rouyn-Noranda —
2016-06-30 985-263 0–9 XXXall 10 · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PATTERSON LA
2016-06-30 985-272 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MANDEVILLE LA
2016-06-30 985-299 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NAPOLEONVL LA
2016-06-30 989-338 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CARSONCITY MI
2016-06-29 207-292 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BIDDEFORD ME
2016-06-29 209-707 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MANTECA CA
2016-06-29 253-409 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2016-06-29 319-252 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATERLOO IA
2016-06-29 323-917 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 13 CA
2016-06-29 337-612 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. 4930 IOTA LA
2016-06-29 337-614 0XXX1XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. 4930 CANKTON LA
2016-06-29 424-319 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CMTN GRDN CA
2016-06-29 425-616 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2016-06-29 430-312 not yet reported which blocks → ETEX COMMUNCATIONS, LLC DBA ETEX TELECOM - TX 3196 JEFFERSON TX
2016-06-29 438-920 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Montreal —
2016-06-29 505-356 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRANTS NM
2016-06-29 619-513 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-06-29 657-341 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BREA CA
2016-06-29 681-241 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GLENVILLE WV
2016-06-29 709-343 not yet reported which blocks → Bragg Communications Inc. 4878 St. Anthony —
2016-06-29 774-772 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 AUBURN MA
2016-06-29 804-558 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 RICHMOND VA
2016-06-29 904-763 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2016-06-29 909-417 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E POMONA CA
2016-06-29 925-375 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CONCORD CA
2016-06-29 951-484 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-06-29 959-209 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K WATERTOWN CT
2016-06-28 218-501 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MN 184D ALBORN MN
2016-06-28 218-516 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MN 184D BIWABIK MN
2016-06-28 248-907 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E FARMINGTON MI
2016-06-28 267-920 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MORRISVL PA
2016-06-28 317-764 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NOBLESVL IN
2016-06-28 317-778 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2016-06-28 385-441 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-06-28 409-231 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JASPER TX
2016-06-28 424-366 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-06-28 469-847 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLANO TX
2016-06-28 469-858 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GRANDPRARI TX
2016-06-28 469-969 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PLANO TX

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.