NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 518
VERIZON NEW YORK, INC. 225
PAETEC ITEL, LLC 59
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 58
NEW CINGULAR WIRELESS PCS, LLC - DC 45
TC SYSTEMS, INC. - NY 35
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
2013-02-21 518-502 0–9 XXXall 10 · 8 holders which blocks → PRIMELINK, INC. - NY 0065 GLENSFALLS NY
2012-12-17 518-556 0–9 XXXall 10 · 9 holders which blocks → WIDE VOICE, LLC - NY 705G COLONIE NY
2012-12-17 518-558 0–9 XXXall 10 · 3 holders which blocks → CROWN POINT NTWK TECH INC DBA BRIDGE POINT COMM-NY 716G TICONDROGA NY
2012-10-28 518-407 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G ALBANY NY
2012-08-30 518-650 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J ALBANY NY
2012-07-17 518-660 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 HUDSON NY
2012-06-26 518-757 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 BERNE NY
2012-06-11 518-554 0–9 XXXall 10 · 6 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C TUPPERLAKE NY
2012-05-22 518-410 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2012-05-21 518-440 0XXX2XXX4XXX7XXX · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 830G CHATHAM NY
2012-05-18 518-419 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2012-05-14 518-417 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ALBANY NY
2012-04-06 518-530 0–9 XXXall 10 · 4 holders which blocks → THE VOICE APPLICATION NETWORK, LLC 507J ALBANY NY
2012-01-20 518-535 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E DELANSON NY
2012-01-20 518-551 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E PERU NY
2012-01-20 518-552 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SALEM NY
2012-01-20 518-553 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E VALLEY FLS NY
2011-12-06 518-545 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2011-07-11 518-414 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2011-07-11 518-415 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 GLENSFALLS NY
2011-06-09 518-662 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GREENVILLE NY
2011-05-20 518-544 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SUMMIT NY
2011-04-19 518-405 0–9 XXXall 10 · 6 holders which blocks → NEW DIMENSION WIRELESS LTD 825D PLATTSBG NY
2011-04-07 518-390 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2011-03-21 518-460 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GALWAY NY
2011-03-21 518-468 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GREENFLCTR NY
2011-03-21 518-520 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E PALENVILLE NY
2010-11-04 518-380 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC- NY 384C ALBANY NY
2010-10-22 518-313 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 COLONIE NY
2010-10-22 518-317 0–9 XXXall 10 · 8 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C MALONE NY
2010-10-06 518-400 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ROUND LAKE NY
2010-10-06 518-403 0XXX1XXX4XXX5XXX7XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LK LUZERNE NY
2010-09-16 518-318 0–9 XXXall 10 · 7 holders which blocks → TC SYSTEMS, INC. - NY 7140 CAIRO NY
2010-09-07 518-333 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FTCOVINGTN NY
2010-07-07 518-319 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MALONE NY
2010-06-14 518-310 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PLATTSBG NY
2010-05-10 518-300 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2010-02-09 518-703 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2009-09-17 518-305 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 BALLSTNSPA NY
2009-06-09 518-795 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2009-05-07 518-925 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2009-04-17 518-621 0–9 XXXall 10 · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 ALBANY NY
2009-03-10 518-491 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2008-09-15 518-921 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLOVERSVL NY
2008-09-08 518-645 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PLATTSBG NY
2008-09-03 518-227 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E ALBANY NY
2008-08-12 518-649 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ALBANY NY
2008-08-04 518-592 0XXX1XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 MILLERTON NY
2008-08-04 518-771 0XXX1XXX3XXX7XXX9XXX · 5 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 PINEPLAINS NY
2008-08-04 518-939 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 COPAKE NY

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.