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
2019-05-31 772-241 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FORTPIERCE FL
2019-05-31 913-357 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J PAOLA KS
2019-05-31 940-545 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 SEYMOUR TX
2019-05-31 940-570 0XXX1XXX · 2 holders which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 MEGARGEL TX
2019-05-30 240-692 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 GRANTSVL MD
2019-05-30 308-300 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NE 549E NO JULESBG NE
2019-05-30 321-621 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C TITUSVILLE FL
2019-05-30 458-459 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OR 750E BLUE RIVER OR
2019-05-30 480-591 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2019-05-30 689-407 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C WINTERGRDN FL
2019-05-30 719-413 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J COLORDOSPG CO
2019-05-30 863-563 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C POLK CITY FL
2019-05-30 863-663 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C FROSTPROOF FL
2019-05-30 904-906 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C BALDWIN FL
2019-05-30 941-841 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C ENGLEWOOD FL
2019-05-29 208-601 0XXX1XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J COERDALENE ID
2019-05-29 208-609 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J BOISE ID
2019-05-29 217-708 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → WABASH INDEPENDENT NETWORKS, INC DBA WABASH COMM 772H EFFINGHAM IL
2019-05-29 249-487 not yet reported which blocks → Iristel Inc. 154E Bracebridge —
2019-05-29 316-364 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J WICHITA KS
2019-05-29 343-501 not yet reported which blocks → Iristel Inc. 154E Brockville —
2019-05-29 385-332 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D KAYSVILLE UT
2019-05-29 406-401 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J GREATFALLS MT
2019-05-29 406-409 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J BILLINGS MT
2019-05-29 438-357 not yet reported which blocks → Bell Mobility 6574 Montreal —
2019-05-29 470-571 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J ATLANTA GA
2019-05-29 605-403 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J SIOUX FLS SD
2019-05-29 647-615 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-05-29 689-205 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J ORLANDO FL
2019-05-29 701-957 0XXX2XXX9XXX · 3 holders which blocks → CSC WIRELESS, LLC 425J BISMARCK ND
2019-05-29 712-524 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - IA 221F COUNCILBLF IA
2019-05-29 785-940 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → CSC WIRELESS, LLC 425J TOPEKA KS
2019-05-29 786-697 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J MIAMI FL
2019-05-29 825-501 not yet reported which blocks → Iristel Inc. 154E Bonnyville —
2019-05-29 907-318 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AK 9413 ANCHORAGE AK
2019-05-28 209-540 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNRA MAIN CA
2019-05-28 240-689 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J WSNG236Z15 MD
2019-05-28 249-488 not yet reported which blocks → Iristel Inc. 154E Bobcaygeon —
2019-05-28 301-709 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J CUMBERLAND MD
2019-05-28 312-668 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J CHICGOZN01 IL
2019-05-28 339-338 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LYNN MA
2019-05-28 424-435 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TORRANCE CA
2019-05-28 502-705 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LOUISVILLE KY
2019-05-28 505-458 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F GALLUP NM
2019-05-28 510-807 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HAYWARD CA
2019-05-28 639-801 not yet reported which blocks → Iristel Inc. 154E Biggar —
2019-05-28 657-384 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WESTMINSTR CA
2019-05-28 669-291 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LOS GATOS CA
2019-05-28 707-713 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ARCATA CA
2019-05-28 814-559 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F CURWENSVL PA

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.