Phone numbers in Guam
What a phone number in Guam carries: its country calling code, an example number for every line type the numbering plan has, the regulator table this server syncs for it and what the weekly coverage measurement found there, and the area-code pages beneath it. Read from the numbering metadata and the regulator’s own table, never from a number anyone typed.
The numbering plan for Guam
Every phone lookup starts from the numbering metadata: it settles whether a number is valid for Guam, how it is written nationally and internationally, and which line type its range belongs to. The example numbers below are the plan’s own examples per line type, not real subscribers.
| calling_code | +1 |
|---|---|
| shared with | 24 other regions |
| example, mobile | +1 671-300-1234 |
| example, fixed line | +1 671-300-1234 |
| example, toll free | +1 800-212-3456 |
| example, premium rate | +1 900-212-3456 |
| regulator table | NANPA central office code report |
| table synced | 2026-09-12 (version 2026-09-11) |
| area-code pages | 1 |
| disposable list | 126,670 listed numbers worldwide, synced 2026-09-07 |
| fictional ranges | 1 reserved for fiction under +1 |
| continent | OC |
| currency | USD |
| timezone | Pacific/Guam |
+1 is shared with American Samoa, Anguilla, Antigua & Barbuda, Bahamas, Barbados, Bermuda, British Virgin Islands, Canada, Cayman Islands, Dominica, Dominican Republic, Grenada, Jamaica, Montserrat, Northern Mariana Islands, Puerto Rico, Sint Maarten, St. Kitts & Nevis, St. Lucia, St. Vincent & Grenadines, Trinidad & Tobago, Turks & Caicos Islands, U.S. Virgin Islands, United States, so the region of a number is settled by its area code, not by the calling code alone.
The regulator table behind a lookup here
NANPA central office code report (synced 2026-09-12, table version 2026-09-11). The table is complete: it lists every assigned block of its plan, so a geographic number outside it is called unassigned. A lookup names the block holder as carrier with carrier_source block_allocation — the original allocation, never who serves the number today.
- 204,819 blocks in the table: 198,308 allocated, 0 unassigned, 6,511 reserved.
- 96.8 % of the blocks are allocated.
- 100.0 % of allocated blocks name a holder.
- 40.7 % of allocated blocks settle the line type on their own (57,651 mobile, 23,015 VoIP).
Measured weekly (last on 2026-09-06) from the table itself. These are shares of the regulator’s own table, not of real traffic, and they say nothing about who serves any one number today.
What a lookup answers for a number here
Every number the plan accepts for Guam comes back with its formats, its line_type and line_type_source, its region and timezones, and the is_fictional and is_disposable flags from the bundled fiction ranges and the synced list of SMS-receiving numbers. Because NANPA central office code report covers Guam, a lookup also answers carrier from the block holder and block_status for every geographic number, unassigned included.
Pacific/Guam: the whole country keeps one clock, so a lookup answers that zone for every number here.
Area codes in Guam
1 area-code pages read the same table: the blocks under each code, the holders and the line types they settle.
Run the lookup
The plan’s own example number, answered with every field:
curl https://spaw.co/api/v1/phone \
-H "Authorization: Bearer sk_live_…" \
-H "Content-Type: application/json" \
-d '{"phone": "+1 671-300-1234", "country": "GU"}'Or try one without a key on the free phone number lookup, and read every field in the phone intelligence guide. Checked 2026-09-13.
Other regions
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