Keybase SMS Verification

Yes, Keybase usually accepts second numbers for verification, useful for maintaining separate accounts for different purposes.

Keybase sends codes via SMS by default, but the app itself generates codes once set up.

Afghanistan $0.12, Albania $0.12, Algeria $0.15, Angola $0.06, Anguilla $0.25, Argentina $0.02, Armenia $0.12, Aruba $0.25, Australia $0.58, Austria $0.29, Azerbaijan $0.06, Bahamas $0.19, Bahrain $0.21, Bangladesh $0.12, Barbados $0.18, Belarus $0.06, Belgium $0.24, Belize $0.19, Benin $0.06, Bhutan $0.12, Bolivia $0.06, Bosnia and Herzegovina $0.06, Botswana $0.21, Brazil $0.22, Brunei $0.12, Bulgaria $0.06, Burundi $0.19, Cambodia $0.06, Cameroon $0.06, Canada $0.36, Chad $0.06, Chile $0.15, China $0.15, Colombia $0.19, Comoros $0.20, Croatia $0.28, Cyprus $0.18, Czechia $0.06, Denmark $0.21, Djibouti $0.24, Dominica $0.25, Ecuador $0.06, Egypt $0.15, Eritrea $0.25, Estonia $0.22, Eswatini $0.25, Ethiopia $0.06, Finland $0.22, France $0.58, Gabon $0.06, Gambia $0.25, Georgia $0.06, Ghana $0.06, Gibraltar $0.06, Greece $0.22, Grenada $0.24, Guadeloupe $0.24, Guatemala $0.06, Guinea $0.12, Guyana $0.19, Honduras $0.12, Hong Kong $0.36, Hungary $0.27, Iceland $0.06, India $0.15, Indonesia $0.21, Iraq $0.12, Ireland $0.22, Israel $0.21, Italy $0.19, Jamaica $0.21, Japan $0.18, Jordan $0.12, Kazakhstan $0.06, Kenya $0.06, Kuwait $0.12, Kyrgyzstan $0.06, Laos $0.06, Latvia $0.18, Lebanon $0.06, Lesotho $0.19, Liberia $0.06, Lithuania $0.22, Luxembourg $0.06, Macau $0.06, Madagascar $0.25, Malawi $0.06, Malaysia $0.18, Maldives $0.12, Mali $0.06, Malta $0.06, Mauritania $0.25, Mauritius $0.24, Mexico $0.18, Moldova $0.06, Monaco $0.12, Mongolia $0.06, Montenegro $0.12, Montserrat $0.25, Morocco $0.15, Mozambique $0.06, Namibia $0.19, Nepal $0.12, New Zealand $0.36, Nicaragua $0.15, Niger $0.19, Nigeria $0.15, Norway $0.15, Oman $0.12, Pakistan $0.18, Panama $0.25, Paraguay $0.06, Peru $0.15, Philippines $0.18, Poland $0.36, Portugal $0.36, Qatar $0.12, Romania $0.15, Rwanda $0.19, Senegal $0.06, Serbia $0.15, Seychelles $0.25, Singapore $0.21, Slovakia $0.18, Slovenia $0.25, Somalia $0.34, South Africa $0.14, Spain $0.36, Suriname $0.20, Sweden $0.36, Switzerland $0.33, Taiwan $0.14, Tajikistan $0.15, Tanzania $0.06, Thailand $0.22, Togo $0.19, Tunisia $0.16, Turkey $0.18, Turkmenistan $0.12, Uganda $0.06, Ukraine $0.22, Uruguay $0.12, Uzbekistan $0.15, Venezuela $0.12, Vietnam $0.18, Yemen $0.12, Zambia $0.15, Zimbabwe $0.06. You pay once per number from your credit, and the price comes back if no code arrives in 20 minutes.

Pick the country where you use Keybase if it checks for a local number. Otherwise the lowest price is Argentina at $0.02; every country receives the same SMS code.

The number is open for 20 minutes after you buy it. Every Keybase SMS that reaches it in that time is shown in your inbox, and you can ask Keybase for another code at no extra cost.