diff --git a/src/postcode-regexes.ts b/src/postcode-regexes.ts
index 2de70ea..0015d10 100644
--- a/src/postcode-regexes.ts
+++ b/src/postcode-regexes.ts
@@ -171,6 +171,27 @@ export const POSTCODE_REGEXES: Map<string, RegExp> = new Map([
   [CountryCode.WF, /^986\d{2}$/],
   [CountryCode.XK, /^\d{5}$/],
   [CountryCode.YT, /^976\d{2}$/],
+  [CountryCode.GI, /^GX11 1AA/],
+  [CountryCode.BT, /^\d{5}/],
+  [CountryCode.AL, /^\d{4}/],
+  [CountryCode.CU, /^\d{5}/],
+  [CountryCode.UM, /^96898/],
+  [CountryCode.AI, /^(?:AI-)?2640/],
+  [CountryCode.AF, /^\d{4}/],
+  [CountryCode.SD, /^\d{5}/],
+  [CountryCode.VC, /^VC\d{4}/],
+  [CountryCode.TA, /^TDCU 1ZZ/],
+  [CountryCode.NA, /^\d{5}/],
+  [CountryCode.EH, /^\d{5}/],
+  [CountryCode.BL, /^9[78][01]\d{2}/],
+  [CountryCode.TZ, /^\d{4,5}/],
+  [CountryCode.AC, /^ASCN 1ZZ/],
+  [CountryCode.VG, /^VG\d{4}/],
+  [CountryCode.MZ, /^\d{4}/],
+  [CountryCode.MF, /^9[78][01]\d{2}/],
+  [CountryCode.MM, /^\d{5}/],
+  [CountryCode.SV, /^CP [1-3][1-7][0-2]\d/],
+  [CountryCode.IR, /^\d{5}-?\d{5}/],
   [CountryCode.PE, /^[0-2]\d{4}$/],
   [CountryCode.INTL, /^(?:[A-Z0-9]+([- ]?[A-Z0-9]+)*)?$/i],
   [CountryCode.CO, /^(0[58]|1[135789]|2[0357]|4[147]|5[024]|6[368]|7[036]|8[1568]|9[4579])\d{4}$/],
diff --git a/src/postcode-types.ts b/src/postcode-types.ts
index 8e28340..7cc25e4 100644
--- a/src/postcode-types.ts
+++ b/src/postcode-types.ts
@@ -163,6 +163,27 @@ export enum CountryCode {
   XK = 'XK',
   YT = 'YT',
   PE = 'PE',
+  GI = "GI",
+  BT = "BT",
+  AL = "AL",
+  CU = "CU",
+  UM = "UM",
+  AI = "AI",
+  AF = "AF",
+  SD = "SD",
+  VC = "VC",
+  TA = "TA",
+  NA = "NA",
+  EH = "EH",
+  BL = "BL",
+  TZ = "TZ",
+  AC = "AC",
+  VG = "VG",
+  MZ = "MZ",
+  MF = "MF",
+  MM = "MM",
+  SV = "SV",
+  IR = "IR",
   INTL = 'INTL',
   CO = 'CO'
 }
diff --git a/test/main.spec.ts b/test/main.spec.ts
index 4dd6e23..2882814 100644
--- a/test/main.spec.ts
+++ b/test/main.spec.ts
@@ -22,6 +22,7 @@ describe('postcodeValidator', () => {
       { postcode: '01000', country: 'PE' },
       { postcode: '12345', country: 'TW' },
       { postcode: '123456', country: 'TW' },
+      { postcode: '12341-12213', country: 'IR' },
     ];
 
     expect.assertions(validPostcodes.length);
@@ -47,6 +48,7 @@ describe('postcodeValidator', () => {
       { postcode: '0100', country: 'PE' },
       { postcode: '010000', country: 'PE' },
       { postcode: '0A000', country: 'PE' },
+      { postcode: '1121234', country: 'IR' },
     ];
 
     expect.assertions(invalidPostcodes.length);
@@ -63,12 +65,13 @@ describe('postcodeValidator', () => {
 
 describe('postcodeValidatorExistsForCountry', () => {
   test('should return true for valid country code', () => {
-    expect.assertions(5);
+    expect.assertions(6);
     expect(postcodeValidatorExistsForCountry('PR')).toBeTruthy();
     expect(postcodeValidatorExistsForCountry('AU')).toBeTruthy();
     expect(postcodeValidatorExistsForCountry('DE')).toBeTruthy();
     expect(postcodeValidatorExistsForCountry('KY')).toBeTruthy();
     expect(postcodeValidatorExistsForCountry('PE')).toBeTruthy();
+    expect(postcodeValidatorExistsForCountry('IR')).toBeTruthy();
   });
 
   test('should return false for invalid country code', () => {