NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2004-10-22 601-993 1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SHUBUTA MS
2004-10-22 662-276 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OKOLONA MS
2004-10-22 662-591 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NETTLETON MS
2004-10-22 662-601 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BALDWYN MS
2004-10-22 662-729 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBSAFB MS
2004-10-22 662-855 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CALEDONIA MS
2004-10-22 662-995 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SHANNON MS
2004-10-21 406-314 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KALISPELL MT
2004-10-21 418-934 not yet reported which blocks → Bell Mobility 6574 Quebec —
2004-10-21 450-494 not yet reported which blocks → Bell Mobility 6574 Sorel —
2004-10-21 819-351 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2004-10-21 819-421 not yet reported which blocks → Bell Mobility 6574 St-Jovite —
2004-10-20 215-301 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 215-400 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 215-410 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 215-586 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 215-834 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 215-910 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PHLDLPHZN1 PA
2004-10-20 231-498 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ELK RAPIDS MI
2004-10-20 304-470 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - WV 9944 PHILIPPI WV
2004-10-20 318-406 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LECOMPTE LA
2004-10-20 318-596 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GRAMBLING LA
2004-10-20 318-598 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 STERLINGTN LA
2004-10-20 318-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CALHOUN LA
2004-10-20 318-602 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MANY LA
2004-10-20 318-618 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GRAND CANE LA
2004-10-20 337-409 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VINTON LA
2004-10-20 337-415 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SWEET LAKE LA
2004-10-20 517-224 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 POTTERVL MI
2004-10-20 517-833 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MASON MI
2004-10-20 646-808 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2004-10-20 765-405 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 YORKTOWN IN
2004-10-20 765-444 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MIDDLETOWN IN
2004-10-20 803-380 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BATH SC
2004-10-20 843-268 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAKE VIEW SC
2004-10-20 843-306 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CLIO SC
2004-10-20 843-350 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BLENHEIM SC
2004-10-20 843-400 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MCCOLL SC
2004-10-20 843-418 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LATTA SC
2004-10-20 864-513 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ANTIOCH SC
2004-10-20 956-773 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LASARA TX
2004-10-20 985-464 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 GIBSON LA
2004-10-20 985-465 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DULAC LA
2004-10-20 985-466 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MONTEGUT LA
2004-10-20 985-467 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 PONCHATOUL LA
2004-10-20 985-664 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 RACELAND LA
2004-10-20 989-882 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 VASSAR MI
2004-10-19 202-598 0–9 XXXall 10 · 2 holders which blocks → VERIZON WASHINGTON DC, INC. 9211 WSHNGTNZN1 DC
2004-10-19 606-499 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MIDDLESBO KY
2004-10-19 615-686 0–9 XXXall 10 · 4 holders which blocks → LINGO TELECOM, LLC 5468 NASHVILLE TN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.