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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.

+1 XXX XXX XXXXcountry code (United States)national subscriber numberE.164 caps the whole string at 15 digits - the example digits are placeholders(national number length varies by market); only the +1 prefix is United States-specific
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 IDnot supported (per CTIA messaging principles / carrier A2P 10DLC framework, retrieved 2026-07-26)
Registration regime10DLC
Dominant language(s)English
Native-text charsetGSM-7 — 160 characters per single SMS, 153 per concatenated segment (GSM 03.38 default alphabet vs script analysis, retrieved 2026-07-27)
Published smsroute rateUSD 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.

GSM-7 (160 chars/segment, 153 concatenated)1 segment = 160 chars2 segments = 306 chars3 segments = 459 chars
Cost per message at the published rate (0.0125 USD, 2026-07-27)1 segment = $0.01252 segments = $0.0253 segments = $0.0375Multipart messages are commonly billed per segment - the segment ruler above shows where each boundary falls.

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).

Every figure above is maintained by SMSRoute guides with a named source and retrieval date - the machine-readable copy for United States lives in api/v2/countries.json (CC-BY), field-level provenance included.

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).
How do I test SMS delivery to the United States without a local SIM?
Delivery-testing services send to real local United States numbers. SMSRoute accounts include free test credits that prove delivery on the +1 network.
Can I use my company name as the sender for SMS to the United States?
No. US carriers do not deliver alphanumeric sender IDs; brands register a 10DLC campaign or use a toll-free/short code instead.

Related

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.