NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2023-03-14 561-813 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 PAHOKEE FL
2023-03-14 567-403 0XXX1XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NORWALK OH
2023-03-14 582-820 0XXX7XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H HUNTINGDON PA
2023-03-14 605-514 0–9 XXXall 10 · 4 holders which blocks → NATIVE WIRELESS, LLC 078J HURON SD
2023-03-14 659-997 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BIRMINGHAM AL
2023-03-14 765-802 1XXX2XXX9XXX · 3 holders which blocks → NUSO, LLC 732J BROOKVILLE IN
2023-03-14 785-516 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORNING KS
2023-03-14 785-552 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOLDIER KS
2023-03-14 872-329 0–9 XXXall 10 · 2 holders which blocks → AT&T - LOCAL 7421 CHICGOZN10 IL
2023-03-14 872-330 0–9 XXXall 10 · 2 holders which blocks → LEAP TELECOM, LLC 616J CHICGOZN02 IL
2023-03-14 908-570 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NJ 637C ELIZABETH NJ
2023-03-14 930-278 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J BRAZIL IN
2023-03-13 365-438 not yet reported which blocks → Bell Mobility 6574 Hamilton —
2023-03-13 437-654 not yet reported which blocks → Bell Mobility 6574 Toronto —
2023-03-13 468-359 not yet reported which blocks → Bell Mobility 6574 Arthabaska —
2023-03-13 572-214 1XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 HENNESSEY OK
2023-03-13 903-840 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDGEWOOD TX
2023-03-10 216-493 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CLEVELAND OH
2023-03-10 225-512 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J BATONROUGE LA
2023-03-10 239-423 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 732J NAPLES FL
2023-03-10 239-427 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NAPLES FL
2023-03-10 239-428 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NAPLES FL
2023-03-10 239-442 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NO NAPLES FL
2023-03-10 318-522 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J SHREVEPORT LA
2023-03-10 325-332 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLYDE TX
2023-03-10 337-259 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J LAFAYETTE LA
2023-03-10 346-635 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J HSTNSUBURB TX
2023-03-10 352-781 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E BELLEVIEW FL
2023-03-10 352-782 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E LEESBURG FL
2023-03-10 385-520 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J SALT LAKE UT
2023-03-10 386-375 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → HD CARRIER LLC 321J DAYTONABCH FL
2023-03-10 409-307 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GALVESTON TX
2023-03-10 413-288 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J SPRINGFLD MA
2023-03-10 417-604 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → HD CARRIER LLC 321J SPRINGFLD MO
2023-03-10 448-221 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J PENSACOLA FL
2023-03-10 448-256 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - FL 937C DESTIN FL
2023-03-10 448-327 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C CANTONMENT FL
2023-03-10 448-408 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - FL 937C MONTICELLO FL
2023-03-10 448-428 0XXX4XXX5XXX6XXX7XXX which blocks → ONVOY, LLC - FL 937C QUINCY FL
2023-03-10 448-587 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C HOLLEYNVRR FL
2023-03-10 502-616 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LA GRANGE KY
2023-03-10 505-547 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FARMINGTON NM
2023-03-10 513-220 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J CINCINNATI OH
2023-03-10 517-350 0XXX1XXX8XXX9XXX · 2 holders which blocks → HD CARRIER LLC 321J LANSING MI
2023-03-10 559-820 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2023-03-10 562-642 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LONG BEACH CA
2023-03-10 626-682 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2023-03-10 661-701 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2023-03-10 681-461 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 KINGWOOD WV
2023-03-10 689-299 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KISSIMMEE FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.