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
Download CSV ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-03-24 479-383 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 VAN BUREN AR
2020-03-24 501-394 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2020-03-24 531-242 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 OMAHA NE
2020-03-24 618-280 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E ADDIEVILLE IL
2020-03-24 720-694 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2020-03-24 720-812 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2020-03-24 725-229 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2020-03-24 725-230 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 9145 LAS VEGAS NV
2020-03-24 786-305 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2020-03-24 857-359 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2020-03-24 980-433 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 CHARLOTTE NC
2020-03-23 225-446 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ALBANY LA
2020-03-23 239-399 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NAPLES FL
2020-03-23 326-236 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OH 464C FARMERSVL OH
2020-03-23 326-266 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C RAINSBORO OH
2020-03-23 326-626 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - OH 464C MEDWAY OH
2020-03-23 337-487 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2020-03-23 437-323 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-03-23 437-362 not yet reported which blocks → TELUS Mobility 646F Toronto —
2020-03-23 437-363 not yet reported which blocks → TELUS Mobility 646F Toronto —
2020-03-23 438-459 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-03-23 618-260 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E HOYLETON IL
2020-03-23 762-248 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 HAMILTON GA
2020-03-23 774-428 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BROCKTON MA
2020-03-23 857-358 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2020-03-20 385-366 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D MIDVALE UT
2020-03-20 619-650 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-03-20 659-465 0XXX2XXX3XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H VINCENT AL
2020-03-20 707-850 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOWER LAKE CA
2020-03-20 830-280 0XXX1XXX2XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SABINA TX
2020-03-19 240-721 0–9 XXXall 10 · 3 holders which blocks → VERIZON MARYLAND, INC. 9212 WSHNGTNZN5 MD
2020-03-19 470-579 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA GA
2020-03-19 657-427 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GARDEN GRV CA
2020-03-19 872-262 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 CHICGOZN09 IL
2020-03-18 253-316 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-03-18 309-608 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E SAN JOSE IL
2020-03-18 424-445 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2020-03-18 440-648 6XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ORWELL OH
2020-03-18 442-316 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VTVL HSPR CA
2020-03-18 475-348 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2020-03-18 585-515 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E HILTON NY
2020-03-18 657-426 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-03-18 765-297 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CLARKSHILL IN
2020-03-18 765-394 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F THORNTOWN IN
2020-03-18 951-521 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-17 236-544 not yet reported which blocks → Videotron Ltd. 383F Nanaimo —
2020-03-17 236-768 not yet reported which blocks → Videotron Ltd. 383F Vernon —
2020-03-17 236-792 not yet reported which blocks → Videotron Ltd. 383F Prince George —
2020-03-17 585-508 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E HOLCOMB NY
2020-03-17 786-755 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MIAMI FL

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.