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
2016-09-22 413-412 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NORTHADAMS MA
2016-09-22 551-276 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 RIDGEWOOD NJ
2016-09-22 586-696 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ROSEVILLE MI
2016-09-22 702-827 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F LAUGHLIN NV
2016-09-22 702-846 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2016-09-22 716-466 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C HOLLAND NY
2016-09-22 804-600 0–9 XXXall 10 · 6 holders which blocks → AMELIA TEL. CORP. 0217 AMELIACTHS VA
2016-09-22 845-969 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC- NY 384C STANFORDVL NY
2016-09-22 978-643 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BARRE MA
2016-09-21 226-588 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Galt —
2016-09-21 226-589 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Hespeler —
2016-09-21 251-320 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON AL
2016-09-21 254-351 0XXX1XXX2XXX3XXX9XXX · 3 holders which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 CRAWFORD TX
2016-09-21 272-209 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 WILLIAMSPT PA
2016-09-21 308-474 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BERTRAND NE
2016-09-21 343-490 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Kanata-Stittsville —
2016-09-21 360-660 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABERDEEN WA
2016-09-21 360-728 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2016-09-21 413-507 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SPRINGFLD MA
2016-09-21 423-818 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TN 525E JELLICO TN
2016-09-21 424-421 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-21 437-200 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-201 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-202 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-203 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-204 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-205 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-206 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-207 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-208 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 437-209 not yet reported which blocks → TELUS Mobility 8303 Toronto —
2016-09-21 442-297 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 EL CENTRO CA
2016-09-21 563-521 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MAQUOKETA IA
2016-09-21 573-798 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MO 093F MOREHOUSE MO
2016-09-21 573-966 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MO 093F LEADWOOD MO
2016-09-21 603-484 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 NASHUA NH
2016-09-21 619-833 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C JACUMBA CA
2016-09-21 650-476 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-09-21 651-435 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-09-21 657-346 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-09-21 669-213 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2016-09-21 669-283 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SNJS WEST CA
2016-09-21 669-284 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNJS NORTH CA
2016-09-21 682-408 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-09-21 763-339 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2016-09-21 778-249 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Newton —
2016-09-21 778-662 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A North Vancouver —
2016-09-21 778-663 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Richmond —
2016-09-21 778-664 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Whalley —
2016-09-21 782-337 not yet reported which blocks → TELUS Integrated Communications 2782 Caledonia —

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.