United States: SMS delivery facts
SMS to the United States uses calling code +1. Alphanumeric sender IDs are not supported under the 10DLC registration scheme; brands register a 10DLC campaign or use a toll-free or short code instead. English is the primary language and the GSM-7 charset applies for encoding.
| Country calling code | +1 (ITU-T E.164 assigned country codes, retrieved 2026-07-27) |
|---|---|
| E.164 format | +1 followed by the national subscriber number, no leading trunk zero, 15 digits maximum overall (ITU-T E.164) |
| Alphanumeric sender ID | not supported (per CTIA messaging principles / carrier A2P 10DLC framework, retrieved 2026-07-26) |
| Registration regime | 10DLC |
| Dominant language(s) | English |
| Native-text charset | GSM-7 — 160 characters per single SMS, 153 per concatenated segment (GSM 03.38 default alphabet vs script analysis, retrieved 2026-07-27) |
| Published smsroute rate | USD 0.0125 per message, dated snapshot (source, retrieved 2026-07-27). Current rate and send path: rate card for United States |
Sender-ID rules
US carriers do not deliver alphanumeric sender IDs; brands register a 10DLC campaign or use a toll-free/short code instead. (per CTIA messaging principles / carrier A2P 10DLC framework, verified 2026-07-26)
US carriers do not deliver alphanumeric sender IDs; brands register a 10DLC campaign or use a toll-free/short code instead under the 10DLC registration scheme. The GSM-7 charset class means single segments hold 160 characters and concatenated segments hold 153 characters each.
Character set and message length
Native English text is classed as GSM-7 here: 160 characters fit a single SMS and 153 per segment once a message is concatenated.
To count segments for a concrete message, use the UDH segment surgeon; to compare all 40 countries side by side, the country requirements explorer reads the same open dataset (CC-BY 4.0).
Frequently asked
- Are alphanumeric sender IDs allowed for SMS to the United States?
- No. Alphanumeric sender IDs are not supported; US carriers do not deliver them and brands register a 10DLC campaign or use a toll-free/short code instead.
- What charset and segment lengths apply to United States SMS?
- The charset class is GSM-7, giving 160 characters for a single segment and 153 characters per segment when concatenated.
- What is the calling code and published rate for the United States?
- The calling code is +1. The published rate is 0.0125 USD (retrieved 2026-07-27).
Related
- Vietnam: SMS delivery facts
- Australia: SMS delivery facts
- Austria: SMS delivery facts
- Sender ID (glossary)
- GSM-7 (glossary) · UCS-2 (glossary)
- All 40 country fact sheets
Facts on this page are dated snapshots with named sources; rates change — the linked rate card is authoritative. Corrections: ops@smsroute.cc. Last verified 2026-07-27.