AdSense placeholder
Paste your AdSense script + ad units in src/layout_bottom.php, then set $ads_enabled = true.
Home / Carriers / GRANITE STATE TELEPHONE, INC.

GRANITE STATE TELEPHONE, INC.

Operating Company Number (OCN): 0039

Browse states

Is this carrier legit?

Carriers are telecom operating companies that own number blocks (NPA-NXX). A number showing this carrier does not guarantee the caller is that company — scam calls can spoof caller ID.

Ad Unit
Optional ad placement.

Number blocks (sample)

StateNPANXXRate centerOpen
NH 603 478 HLLSBUPVLG Prefix
NH 603 495 WASHINGTON Prefix
NH 603 529 WEARE Prefix
NH 603 887 CHESTER Prefix
Showing up to 2,000 blocks (cap for performance).

SEO keywords covered

carrier lookup • operating company number • ocn lookup • who owns this number • npa nxx • rate center

© 2026 Phone Directory.
Light theme (AdSense-ready).