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
2018-03-23 213-433 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 10 CA
2018-03-23 229-665 0XXX2XXX3XXX4XXX5XXX · 2 holders which blocks → VONAGE AMERICA LLC 197D RICHLAND GA
2018-03-23 315-275 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 UTICA NY
2018-03-23 316-669 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D WICHITA KS
2018-03-23 323-910 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 14 CA
2018-03-23 346-328 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SPRING TX
2018-03-23 352-488 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 WEEKICHSPG FL
2018-03-23 360-517 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SILVERDALE WA
2018-03-23 423-549 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D JOHNSON CY TN
2018-03-23 469-459 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BARDWELL TX
2018-03-23 470-880 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA NE GA
2018-03-23 479-335 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D ROGERS AR
2018-03-23 561-343 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2018-03-23 608-982 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D MADISON WI
2018-03-23 682-268 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 FORT WORTH TX
2018-03-23 707-919 0–9 XXXall 10 · 8 holders which blocks → METROPCS, INC. 5562 SANTA ROSA CA
2018-03-23 737-231 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2018-03-23 762-775 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D AUGUSTA GA
2018-03-23 864-523 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SC 548E EASLEY SC
2018-03-23 912-744 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D SAVANNAH GA
2018-03-23 925-510 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CONCORD CA
2018-03-23 941-253 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 BRADENTON FL
2018-03-23 986-224 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF IDAHO, LLC - ID 7511 BOISE ID
2018-03-22 202-922 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - DC 074F WSHNGTNZN1 DC
2018-03-22 205-738 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F SPRINGVL AL
2018-03-22 226-389 not yet reported which blocks → Distributel 082E Sombra —
2018-03-22 226-390 not yet reported which blocks → Distributel 082E Petrolia —
2018-03-22 226-392 not yet reported which blocks → Distributel 082E Bright's Grove —
2018-03-22 226-394 not yet reported which blocks → Distributel 082E Brigden —
2018-03-22 226-451 not yet reported which blocks → Distributel 082E Wyoming —
2018-03-22 226-496 not yet reported which blocks → Distributel 082E Oil Springs —
2018-03-22 226-497 not yet reported which blocks → Distributel 082E Corunna —
2018-03-22 226-498 not yet reported which blocks → Distributel 082E Courtright —
2018-03-22 226-502 not yet reported which blocks → Distributel 082E Port Lambton —
2018-03-22 226-508 not yet reported which blocks → Distributel 082E Watford —
2018-03-22 226-509 not yet reported which blocks → Distributel 082E Alvinston —
2018-03-22 309-328 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E NORTHPEKIN IL
2018-03-22 332-877 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2018-03-22 346-327 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2018-03-22 424-409 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2018-03-22 440-595 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F VERMILION OH
2018-03-22 469-457 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MAYPEARL TX
2018-03-22 551-251 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2018-03-22 562-725 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALAMITOS CA
2018-03-22 579-312 not yet reported which blocks → Distributel 083E Chambly —
2018-03-22 579-313 not yet reported which blocks → Distributel 083E Marieville —
2018-03-22 579-314 not yet reported which blocks → Distributel 083E St-Bruno —
2018-03-22 579-315 not yet reported which blocks → Distributel 083E St-Marc —
2018-03-22 579-316 not yet reported which blocks → Distributel 083E Ste-Julie-de-Vercheres —
2018-03-22 579-317 not yet reported which blocks → Distributel 083E Varennes —

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.