IBAN format · DJ

Djibouti IBAN format: 27 characters.

Djibouti IBANs have 27 characters: the country code DJ, two check digits and a 23-character BBAN, the national account number, laid out as 5!n5!n11!n2!n.

Djibouti IBAN structure

DJ2100010000000154000100186

Country code: DJ
Check digits: 21
Bank code: 00010
Branch code: 00000
Account: 0154000100186

Parts of a Djibouti IBAN and their positions
Positions	Part	In the example
1–2	Country code	DJ
3–4	Check digits	21
5–9	Bank code	00010
10–14	Branch code	00000
15–27	Account	0154000100186

The BBAN, segment by segment

The registry writes the BBAN in SWIFT notation: n is a digit, a an upper-case letter, c a letter or digit, and the ! means a fixed length. 5!n5!n11!n2!n reads:

The Djibouti BBAN format, segment by segment
Positions	Notation	Holds	Example
5–9	5!n	5 digitsBank code	00010
10–14	5!n	5 digitsBranch code	00000
15–25	11!n	11 digits	01540001001
26–27	2!n	2 digits	86

Djibouti IBAN example

DJ21 0001 0000 0001 5400 0100 186 is the sample the SWIFT IBAN Registry publishes for Djibouti: a well-formed IBAN for showing the format, not a real account. Written electronically it has no spaces (DJ2100010000000154000100186); on paper it is printed in groups of four.

Its check digits, worked through with ISO 7064 mod 97-10:

Move the country code and check digits to the end
00010000000154000100186DJ21
Replace each letter with two digits (A = 10 … Z = 35)
D = 13, J = 19
00010000000154000100186131921
Divide that number by 97 and keep the remainder
Remainder 1. A valid IBAN always leaves 1, so the check digits are right.
Where the check digits come from
Put 00 in their place (DJ00…), repeat steps 1–3: remainder 77. The check digits are 98 − 77 = 21.

SEPA

Djibouti is not in the Single Euro Payments Area, so SEPA credit transfers and direct debits don’t reach DJ IBANs.

What the format can and can’t tell you

Valid means the structure and check digits are right — not that the account exists or can receive payments.
National check digits inside the BBAN (e.g. the French RIB key, or the Spanish, Belgian and Italian CIN digits) are not verified.
Bank and branch codes are read from their positions; they are not looked up in a bank directory.

Check DJ IBANs from code or an AI agent

REST · GET · no key

curl -s 'https://payopskit.com/api/v1/iban/DJ2100010000000154000100186'

MCP · tools/call · validate_iban

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "validate_iban",
    "arguments": {
      "iban": "DJ2100010000000154000100186"
    }
  }
}

Response (JSON)

{
  "input": "DJ2100010000000154000100186",
  "iban": "DJ2100010000000154000100186",
  "print": "DJ21 0001 0000 0001 5400 0100 186",
  "valid": true,
  "country": {
    "code": "DJ",
    "name": "Djibouti",
    "sepa": false,
    "sepaNote": null
  },
  "checkDigits": "21",
  "expectedCheckDigits": "21",
  "length": {
    "actual": 27,
    "expected": 27
  },
  "bban": "00010000000154000100186",
  "bbanFormat": "5!n5!n11!n2!n",
  "bankCode": "00010",
  "branchCode": "00000",
  "parts": [
    {
      "label": "Country code",
      "value": "DJ",
      "start": 0,
      "end": 2,
      "kind": "country"
    },
    {
      "label": "Check digits",
      "value": "21",
      "start": 2,
      "end": 4,
      "kind": "check"
    },
    {
      "label": "Bank code",
      "value": "00010",
      "start": 4,
      "end": 9,
      "kind": "bank"
    },
    {
      "label": "Branch code",
      "value": "00000",
      "start": 9,
      "end": 14,
      "kind": "branch"
    },
    {
      "label": "Account",
      "value": "0154000100186",
      "start": 14,
      "end": 27,
      "kind": "account"
    }
  ],
  "checks": {
    "characters": true,
    "country": true,
    "length": true,
    "bbanFormat": true,
    "checksum": true
  },
  "errors": [],
  "notes": [
    "Valid means the structure and check digits are right — not that the account exists or can receive payments.",
    "National check digits inside the BBAN (e.g. the French RIB key, or the Spanish, Belgian and Italian CIN digits) are not verified."
  ]
}

The MCP server is at /mcp (Streamable HTTP, no key); the API and MCP docs show how to connect Claude, Cursor or VS Code.

From a national account number: GET /api/v1/iban/check-digits?country=DJ&bban=… or the MCP tool compute_iban_check_digits computes the check digits and the whole IBAN.

Other 27-character IBANs

The same length doesn’t mean the same structure: compare the BBAN formats. All IBAN formats and lengths

Source: the SWIFT IBAN Registry (ISO 13616), transcribed and checked against each country’s registry example; the positions of bank and branch codes are given only where the registry’s are well established. The SWIFT IBAN Registry is the authority. Informational only.