South Sudan WhatsApp Full-Format Screening Tutorial

Here’s the answer first

The international area code for South Sudan is+211, the valid number length after removing the country code is9th place。 The international dialing format is+211 912 345 678(The middle separation is for reading only); South Sudanese local dialing is usually written as0912 345 678, that is, the preceding zero is left before the number.International formats must remove the leading zeroOtherwise, it would be written+211 0912 345 678This will result in the number being invalid.

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Basic rules for South Sudanese phone numbers

Country code and number length

After gaining independence in 2011, South Sudan received an official country code assigned by the International Telecommunication Union (ITU).+211。 According to ITU’s E.164 numbering scheme, the length of valid numbers (the number digits after removing the country code) for South Sudanese phone numbers is 9 digits.

A common misunderstanding is mistakenly taking the last 9 digits of a number without the country code as “excluding the local prefix.” In fact, local dialing habits add a leading zero before the number, creating the illusion of “10 digits.” The correct way to handle this is:

• International format (E.164)：+211 912 345 678, a total of 13 digits (211 occupies 3 digits, 9 digits, excluding separators)
• Local format (including lead zeros)：0912 345 678, a total of 10 people

Section Explanation

South Sudan’s mobile communication operators mainly include Zain South Sudan, MTN South Sudan, and Digitel. Different operators have different signal ranges, with common ones including:

Operators	Common number segments (after preceding 0)
Zain	Starting with 91 and 92
MTN	90, starting with 92
Digitel	Starting with 95 and 96

⚠️ License plate ranges will be adjusted according to the operator’s number release plan. The above information is for preliminary judgment only; actual selection should be based on the latest official number range data.

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International format vs. local format: How to write correctly

International format

Send SMS to South Sudanese mobile numbers, register WhatsApp, make international calls or check data, all using the international format:

+211912345678

Local format

When calling landlines or mobile phones within South Sudan, local formats can be used; Different operators may have different dialing rules, commonly written as:

0912345678

Common writing comparisons

Scene	The correct way to write it	Incorrect writing
International SMS / WhatsApp / Number detection	+211912345678	00211912345678 (non-standard), 0912345678 (missing area code)
Local dialing in South Sudan	0912345678	2110912345678 (Repeat Lead 0)
Excel stores the original numbers	Set to text and enter 211912345678 or 00211912345678	Directly input 211912345678 (recognized as a value)

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The prefix 0 and 00 are international prefixes

Precedent 0: When to keep and when to delete

Scene	Whether to keep the leading zero	Example
Local dialing in South Sudan	Reserve	0912 345 678
International SMS / Account Registration	Delete	+211 912 345 678
Number detection platform / API	Delete	+211912345678

Core rule: No leading zeros are allowed after country codes. +2110These are nonexistent number ranges.

The number is the only recommended international prefix

+The number is the ITU recommended international access prefix and should be used before all country codes+, rather than using a country’s international access code. If the number comes from South Sudan’s local contact book, it may be as00Or000At the beginning, this approach is not universal among different operators.

Handling numbers starting with 00

Some international SIM cards or local carriers will use them00As international prefixes, for example:

00211912345678

This number is equivalent to+211912345678。 When standardizing, it usually starts with the beginning00Replace with+。

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Handling spaces / brackets / blanks

When displaying numbers, spaces, parentheses, or lines can be used to enhance readability, but all must be cleaned up before data storage and number detection:

Raw data	After standardization
+211 912 345 678	+211912345678
+211-912-345-678	+211912345678
0912 345 678	+211912345678
(00211) 912345678	+211912345678

Suggestion: The first step in the cleaning process should always be to remove all spaces, brackets, and lines from the number, then handle the prefixes.

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E11 questions in Excel

Why did it become the E 11?

and the number should be given+211912345678When entering the form into Excel, Excel cannot set the+It is recognized as a text prefix followed by a 13-digit number, exceeding Excel’s default numerical accuracy (15 significant digits), so it is displayed as scientific notation.

+211912345678In Excel, it is usually displayed as:

2.11912E 11
Or
2.11912E 11

0912345678Excel treats it as a 10-digit value, the leading zero is discarded, and displayed as:

912345678

Solution

Method	Operation
Set text formatting	Before pasting, select the centered column, right-click > set cell formatting > text
Use single quotation marks	Manually add single quotes before the number', for example'+211912345678
Column processing	Data > columns > text
Formula restored	If existing E11 data is corrupted, it needs to be re-imported from the original data

Note: Once the numbers are converted to E 11 in Excel, the original numeric information is lost and cannot be fully recovered; the data must be exported again from the source.

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Repeat number issues

Why do there are duplicates?

South Sudan numbers may exist in various variants in the data:

Variants	Before standardization
International format	+211912345678
00 prefix	00211912345678
With a space	+211 912 345 678
Local band 0	0912 345 678
Excel was broken	2.11912E+11

These five forms actually point to the same number, but when directly deduplicated, they are treated as five different records.

A necessary step before dedging

1. All numbers are uniformly converted to+211912345678Format
2. Delete all non-numeric characters (but keep the initial ones)
3. Complete the country code: local numbers automatically add 211
4. The leading zero after deleting the country code

Only after standardization is completed can accurate deduplication be performed.

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The issue of incorrect country codes

South Sudan maintains close economic ties with neighboring countries, and data often includes numbers from other countries:

Common country code errors	Explanation
+254	Kenya numbers are commonly used by cross-border trade clients
+256	Uganda number
+249	Sudan number (old number before South Sudan’s independence)
+251	Ethiopian numbers

Identification and handling

• The number is 9 digits long, but the country code is 254/256, etc., and should be classified as the corresponding country, not South Sudan.
• The number is given by211It starts out, but in reality, it’s from another country00211then truncated, requiring a backcheck of the original data.
• Some South Sudanese numbers used Sudanese before independence+249The license plate has been changed to 211 after independence, but the old card may still be in use.

When determining the country of ownership of a number, don’t just look at the country code; you also need to consider the number length and number range. If your data mixes multiple country codes, it’s recommended to split the bucket by country code and verify the length one bucket at a time.

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South Sudan Number Standardization Process (can be directly copied as operational steps)

The following process is suitable for scenarios such as WhatsApp activation detection, SMS marketing data cleaning, CRM data organization, and more:

Step 1: Export the original number data, preferably using CSV format to avoid Excel corrupting the number format
Step 2: Remove spaces, parentheses, lines, and other separators
Step 3: Replace the starting 00 with 
Step 4: Check if the remaining string contains the following: 
 - Contain: Enter Step 6
 - Not included: Enter Step 5
Step 5: Handle according to the local number, adding 211 before the number
Step 6: Check if there is a 0 after 211 in the number: 
 - If it appears, delete the 0
 - For example, 2110912345678 → 211912345678
Step 7: Verify the number length: 
 - After removal, the total length should be 12 digits (211 3 digits, 9 digits)
 - Exporting numbers with inconsistent lengths separately for manual verification
Step 8: Perform unique deduplication on standardized numbers
Step 9: Identify operators by number range (if confirmable) for subsequent policy configuration
Step 10: Export standardized results for use in number detection or business reach

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Before / After example

Example of single-digit standardization

Raw data (commonly found in Excel/CRM)	After standardization	Explanation
+211 912 345 678	+211912345678	Remove spaces
0912345678	+211912345678	Local format to complete the code and remove the prefix 0
00211912345678	+211912345678	00 prefix replaced with
+211-912-345-678	+211912345678	Remove the horizontal lines
2.11912E+11	Irreversible	Excel is corrupted and needs to be re-exported
+254912345678	+254912345678	It belongs to Kenyan numbers and should not be included in the South Sudan list

Example of data table cleaning

Assuming the raw data is as follows:

Original number	Standardized results	Is it South Sudan’s number?
0912 345 678	+211912345678	✅
+211955123456	+211955123456	✅
00211920345678	+211920345678	✅
+211 901 234 567	+211901234567	✅
+254 911 000 000	+254911000000	❌ Kenyan numbers, suggesting splitting buckets
091234567	Too long to be long	❌ If one is missing, manual verification is required

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Summary of common errors

Wrong	Consequences	Handle it correctly
International format retention preceding 0	The number cannot be connected, and an error is detected	Delete the zero after 211
Directly remove duplicates from numbers in Excel	The same number is counted again due to different formats	Standardize first, then reduce deduplication
Mix the 00 prefix with	Inconsistent number formats affect subsequent API integration	Uniformly replaced with
Determine the ownership of the number solely based on the country code	Mistakenly assuming the number 254 is South Sudan’s number	Combine the length of the number and the country code for dual judgment
Text format was not set when copying numbers from Excel	The number was converted to E 11, and the data was permanently lost	Export using CSV, or set text columns in advance

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Distinguishing from other countries’ numbers

Country	Country code	Mobile number length (excluding area code)	Is the leading 0 commonly used?
South Sudan	+211	9th place	Locally used, international format deleted
Sudan	+249	9th place	Some numbers locally start with 0
Kenya	+254	9th place	Local values start with 0, and international format is deleted
Uganda	+256	9th place	Local values start with 0, and international format is deleted

South Sudan’s numbering rules are basically the same as those of neighboring East African countries, but country codes differ significantly. When cleaning, special attention must be paid to whether country codes are written incorrectly or omitted.

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About the number cleaning and detection

After completing phone number standardization, it is usually necessary to check the number’s status (such as WhatsApp registration status, activation status, active status, etc.). It is recommended to use the international format of the standardized data+211Import detection tools uniformly at the beginning to avoid false positives caused by local formats.

If you are processing data mainly from South Sudan and mixed with other East African countries, first split it by country code and then implement standardized processes separately, which can significantly improve subsequent testing efficiency and accuracy.

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