By default US Toll-Free A2P numbers can send and receive SMS to +1 Numbers in the US&CA. 

However, there are some countries that are +1 that a TF number cannot reach, including:

• 🇦🇮 Anguilla — +1-264

• 🇧🇸 Bahamas — +1-242

• 🇧🇧 Barbados — +1-246

• 🇧🇲 Bermuda — +1-441

• 🇻🇮 U.S. Virgin Islands — +1-340

• 🇻🇨 Saint Vincent and the Grenadines — +1-784

• 🇱🇨 Saint Lucia — +1-758

• 🇩🇲 Dominica — +1-767

• 🇰🇾 Cayman Islands — +1-345

• 🇰🇳 Saint Kitts and Nevis — +1-869

• 🇬🇩 Grenada — +1-473

• 🇲🇸 Montserrat — +1-664

• 🇹🇨 Turks and Caicos — +1-649

• 🇯🇲 Jamaica — +1-876, +1-658

• 🇩🇴 Dominican Republic — +1-809, +1-829, +1-849

• 🇹🇹 Trinidad and Tobago — +1-868

• 🇵🇷 Puerto Rico — +1-787, +1-939

• 🇬🇺 Guam — +1-671

See more on International Sending here.