Notification > SMS > Service Policy > International Sending Policy

Guide to Sending International SMS Messages

  • When sending international SMS messages, please check the following key points.

Country-specific Sender ID Policy

  • International SMS messages are sent according to country-specific sender ID policies and may be treated as spam if you do not follow the policies.
  • The sending number set by the customer is not guaranteed to be exposed on the receiving device. In most cases, the messages are sent after changing the sending number to a random number in order to send international SMS messages normally.

Sending Policy

  • In countries with strict international SMS message policies such as China and Vietnam, messages can be sent normally only if the content of the sending message is a verification number (OTP).
  • To send messages properly, it is recommended to enter the verification number (OTP) as follows. (Example: Your verification code is 00000)
  • If you wish to send marketing messages, please contact the Customer Center in advance.
  • To send international SMS messages normally, phrases of up to 12 characters may be added to messages according to country-specific policies, and the phrases are included in the number of charged characters.
  • International SMS is sent to international carriers and returns a DLR.
  • Each DLR provides a message status and result code, which allows you to know the delivery status of a particular SMS, but accuracy cannot be absolutely guaranteed, and the message status and result code can be NULL depending on the carrier and handset circumstances.
  • International carriers generally only keep sending logs within 7 days, so depending on the time of inquiry, it is difficult to confirm the exact cause of non-receipt and may take some time.
  • Transmission quality by country is affected by the network and infrastructure environment in that country and may differ from the domestic environment.

Billing Policy

  • International SMS messages are charged based on successful data transmission from overseas carriers.
  • International SMS billing policies are independent of DLR message status and DLR result codes.
  • The device reception result means the success of data transmission to the overseas communication service provider, and may differ from the actual device reception result. Even if the actual user did not receive the message, it may still count towards billing.
  • International SMS can send long messages through the Concatenated message feature. In the case of a long message, you will be charged for the number of messages sent based on character count.
  • With Concatenated message applied, the number of characters that can be sent is reduced while processing headers.
  • The number of characters and concatenated message standards follow the international SMS standards.
  • Even if the message is sent with the concatenated message applied, it may be received by the device in the form of several short messages rather than a long message, depending on the mobile carrier and device policy.
  • The number of charges per message can be checked with the messageCount field of the detailed inquiry from the console and the detailed inquiry api.
encoding 1 charge 2 charges 3 charges 4 charges 5 charges
UCS-2
(Unicode)
70 characters 134 characters
(=67*2)
201 characters
(=67*3)
268 characters
(=67*4)
335 characters
(=67*5)
GSM-7bit 160 characters 306 characters
(=153*2)
459 characters
(=153*3)
612 characters
(=153*4)
765 characters
(=153*5)

International SMS Traffic Pumping

  • SMS traffic pumping refers to exploiting input fields, such as a request to verify a membership number, to send large volumes of SMS for sending OTP messages. Some international mobile network operators (MNOs) artificially drive message sending to increase revenue.
  • When SMS traffic pumping occurs, there is a spike in messages sent to similar number ranges (e.g. +1111111110, +1111111111, +1111111112, +1111111113, etc.) and if you send a one-time password (OTP) SMS, there is a high chance that authentication will not complete.
  • To prevent SMS traffic pumping, if you block sending to country codes where there is no intent to send messages reduces the probability of SMS traffic pumping. Additionally, if you limit the allowed number of OTP verification requests to similar or identical numbers or limit the speed of message delivery per second, you can reduce the magnitude of the damage.
  • When SMS traffic pumping occurs, NHN Cloud may block the sending of some or all volumes of international SMS without prior notice to the relevant AppKey. NHN Cloud is not responsible for any cases of abusing and any cases blocked due to abusing.

Countries Available for Message Delivery

Country name Country name Country code Note
Afghanistan Afghanistan 93
Albania Albania 355
Algeria Algeria 213
American Samoa American Samoa 1684
Andorra Andorra 376
Angola Angola 244
Anguilla Anguilla 1264
Antigua & Barbuda Antigua & Barbuda 1268
Argentina Argentina 54 - When entering an Argentina destination number, the number 9 between the country code and the local number must be omitted
Armenia Armenia 374
Aruba Aruba 297
Australia Australia 61 - Allow marketing, but make sure the content makes it clear how to unsubscribe
Austria Austria 43
Azerbaijan Azerbaijan 994
Bahamas Bahamas 1242
Bahrain Bahrain 973
Bangladesh Bangladesh 880
Barbados Barbados 1246
Belarus Belarus 375
Belgium Belgium 32 - UCS-2 support may not be available
Belize Belize 501
Benin Benin 229
Bermuda Bermuda 1441
Bhutan Bhutan 975
Bolivia Bolivia 591
Bosnia and Herzegovina Bosnia and Herzegovina 387
Botswana Botswana 267
Brazil Brazil 55
British Virgin Islands British Virgin Islands 1340
Brunei Darussalam Brunei Darussalam 673
Bulgaria Bulgaria 359
Burkina Faso Burkina Faso 226
Burundi Burundi 257
Cambodia Cambodia 855
Cameroon Cameroon 237
Cape Verde Cape Verde 238
Cayman Islands Cayman Islands 1345
Central African Republic Central African Republic 236
Chad Chad 235
Chile Chile 56
China China 86 - Sending the same message more than three times in a row to a single recipient may result in spamming.
- You can only send a maximum of 15 times to one recipient per day
- Sending messages with URL links is not allowed
- Marketing content must be pre-approved
- UCS-2 encoding used
Cocos Keeling Islands (Cook Islands) Cocos Keeling Islands (Cook Islands) 682
Colombia Colombia 57
Congo Congo 242
Costa Rica Costa Rica 506
Côte d'Ivoire Côte d'Ivoire 225
Croatia Croatia 385
Cuba Cuba 53
Cyprus Cyprus 357
Czechia Czechia 420
Democratic Republic of the Congo Democratic Republic of the Congo 243
Denmark Denmark 45
Djibouti Djibouti 253
Dominica Dominica 1767
Dominican Republic Dominican Republic 1809
Ecuador Ecuador 593
Egypt Egypt 20
El Salvador El Salvador 503
Equatorial Guinea Equatorial Guinea 240
Eritrea Eritrea 291
Estonia Estonia 372
Ethiopia Ethiopia 251
Falkland Islands Falkland Islands 500
Faroe Islands Faroe Islands 298
Fiji Fiji 679
Finland Finland 358
France France 33
French Guiana French Guiana 594
French Polynesia French Polynesia 689
Gabon Gabon 241
Gambia Gambia 220
Georgia Georgia 995
Germany Germany 49
Ghana Ghana 233
Gibraltar Gibraltar 350
Greece Greece 30
Greenland Greenland 299
Grenada Grenada 1473
Guadeloupe Guadeloupe 590
Guam Guam 1671
Guatemala Guatemala 502
Guinea Guinea 224
Guinea-Bissau Guinea-Bissau 245
Guyana Guyana 592
Haiti Haiti 509
Honduras Honduras 504
Hong-Kong Hong-Kong 852
Hungary Hungary 36
Iceland Iceland 354
India India 91
Indonesia Indonesia 62
Iran Iran 98
Iraq Iraq 964
Ireland Ireland 353
Israel Israel 972 - Can only be sent if you have a local entity in Israel
Italy Italy 39
Jamaica Jamaica 1876
Japan Japan 81
Jordan Jordan 962
Kenya Kenya 254
Kiribati Kiribati 686
Kuwait Kuwait 965 - Requires pre-registration of sending number and fails to send message if not registeredFunctionality
- Requires pre-registration of the sending number and fails to send the message if not registered Kyrgyzstan 996
Laos Laos 856
Latvia Latvia 371
Lebanon Lebanon 961
Lesotho Lesotho 266
Liberia Liberia 231
Libya Libya 218
Liechtenstein Liechtenstein 423
Lithuania Lithuania 370
Luxembourg Luxembourg 352
Macau Macau 853
Madagascar Madagascar 261
Malawi Malawi 265
Malaysia Malaysia 60
Maldives Maldives 960
Mali Mali 223
Malta Malta 356
Marshall Islands Marshall Islands 692
Martinique Martinique 596
Mauritania Mauritania 222
Mauritius Mauritius 230
Mayotte Mayotte 269
Mexico Mexico 52 - Multiple texts sent to the same recipient within a short period of time may result in spamming
Micronesia Micronesia 691
Moldova Moldova 373
Monaco Monaco 377
Mongolia Mongolia 976
Montenegro Montenegro 382
Montserrat Montserrat 1664
Morocco Morocco 212
Morocco Mozambique 258
Myanmar Myanmar 95
Namibia Namibia 264
Nauru Nauru 674
Nederlandse Antillen Nederlandse Antillen 599
Nepal Nepal 977
Netherlands Netherlands 31
New Caledonia New Caledonia 687
New Zealand New Zealand 64
Nicaragua Nicaragua 505
Niger Niger 227
Nigeria Nigeria 234
North Macedonia North Macedonia 389
Northern Marianas Northern Marianas 1670
Norway Norway 47
Oman Oman 968
Pakistan Pakistan 92
Palau Palau 680
Palestine Palestine 970
Panama Panama 507
Papua New Guinea Papua New Guinea 675
Papua New Guinea Paraguay 595
Peru Peru 51 - Chinese characters support may not be available
Philippines Philippines 63 - Messages with URLs can be spammed
Poland Poland 48
Portugal Portugal 351
Puerto Rico Puerto Rico 1787
Qatar Qatar 974
Réunion Island Réunion Island 262
Romania Romania 40
Russia / Kazakhstan Russia / Kazakhstan 7
Rwanda Rwanda 250
S. Tomé & Principe S. Tomé & Principe 239
Saint Helena Saint Helena 290
Samoa Samoa 685
San Marino San Marino 378
Saudi Arabia Saudi Arabia 966
Senegal Senegal 221
Serbia Serbia 381
Seychelles Seychelles 248
Sierra Leone Sierra Leone 232
Singapore Singapore 65 - Requires caller ID registration process and fails to send messages if not registered (can only be registered if you have a local entity in Singapore)
- Pre-registration page: https://smsregistry.sg/web/login
Slovakia Slovakia 421
Slovenia Slovenia 386
Solomon Islands Solomon Islands 677
Somalia Somalia 252
South Africa South Africa 27
South Sudan South Sudan 211
Spain Spain 34
Sri Lanka Sri Lanka 94
St. Kitts and Nevis St. Kitts and Nevis 1869
St. Lucia St. Lucia 1758
St. Pierre & Miquelon St. Pierre & Miquelon 508
St. Vincent and the Grenadines St. Vincent and the Grenadines 1784
Sudan Sudan 249
Suriname Suriname 597
Swaziland Swaziland 268
Sweden Sweden 46
Switzerland Switzerland 41
Syria Syria 963
Taiwan Taiwan 886 - Messages with URLs can be spammed
- Strings outside the GSM-7bit encoding range may be randomly altered
- Marketing content must be pre-approved
Tajikistan Tajikistan 992
Tanzania Tanzania 255
Thailand Thailand 66 - Not allow newlines (""\n"") in message content
Timor-Leste Timor-Leste 670
Togo Togo 228
Tonga Tonga 676
Trinidad & Tobago Rep. Trinidad & Tobago Rep. 1868
Tunisia Tunisia 216
Turkey Turkey 90
Turkmenistan Turkmenistan 993
Turks & Caicos Is. Turks & Caicos Is. 1649
Uganda Uganda 256
Ukraine Ukraine 380
United Arab Emirates United Arab Emirates 971 - Marketing content must be pre-approved
- Make sure the content makes it clear how to unsubscribe
United Kingdom United Kingdom 44
United States / Canada United States / Canada 1
Uruguay Uruguay 598
Uzbekistan Uzbekistan 998
Vanuatu Vanuatu 678
Venezuela Venezuela 58
Vietnam Vietnam 84 - Vietnamese authorities' strong filtering of international SMS may alter the content of the message before reaching to the device
-Only two verification message types allowed
: Your verification code is 000000
: Your OTP code is 000000
- Marketing content must be pre-approved
Virgin Islands (US) Virgin Islands (US) 1284
Wallis and Futuna Wallis and Futuna 681
Yemen Yemen 967
Zambia Zambia 260
Zimbabwe Zimbabwe 263
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