diff --git a/api/src/app.py b/api/src/app.py
index 8dfdef4..f2402ba 100644
--- a/api/src/app.py
+++ b/api/src/app.py
@@ -4,7 +4,7 @@
 from dependencies.common_key_header import common_key_header
 from middlewares import client_auth
 from models import db
-from routes import auth, users
+from routes import auth, users, ipv6
 
 app = FastAPI(title="NetWorkers API", version="1.0.0")
 
@@ -23,5 +23,7 @@ async def get_info() -> dict:
                    dependencies=[Depends(common_key_header)])
 app.include_router(users.router, prefix="/users", tags=["users"],
                    dependencies=[Depends(common_key_header)])
+app.include_router(ipv6.router, prefix="/ipv6", tags=["ipv6"],
+                   dependencies=[Depends(common_key_header)])
 
 db.init_db()
diff --git a/api/src/routes/ipv6.py b/api/src/routes/ipv6.py
new file mode 100644
index 0000000..920e33a
--- /dev/null
+++ b/api/src/routes/ipv6.py
@@ -0,0 +1,22 @@
+"""Users routes module."""
+
+from fastapi import APIRouter, Depends
+
+import utils.ipv6 as ipv6_utils
+from dependencies.jwt import jwt_bearer
+
+router = APIRouter()
+
+@router.get("/simplify/{ipv6}", summary="Get the simplification of the IPV6",\
+    dependencies=[Depends(jwt_bearer)])
+async def get_simplify(ipv6: str) -> dict:
+    """Get simplification of the IPV6."""
+    res = ipv6_utils.simplify(ipv6)
+    return {"ipv6": res}
+
+@router.get("/extend/{ipv6}", summary="Get the extend of the IPV6",\
+    dependencies=[Depends(jwt_bearer)])
+async def get_extend(ipv6: str) -> dict:
+    """Get extend of the IPV6."""
+    res = ipv6_utils.extend(ipv6)
+    return {"ipv6": res}
diff --git a/api/src/utils/ipv6.py b/api/src/utils/ipv6.py
new file mode 100644
index 0000000..9ba04a3
--- /dev/null
+++ b/api/src/utils/ipv6.py
@@ -0,0 +1,57 @@
+"""Module for IPv6 utilities."""
+
+def simplify(ipv6: str) -> str:
+    """Simplify an IPv6 address.
+
+    Args:
+        ipv6 (str): The IPv6 address to simplify.
+
+    Returns:
+        str: The simplified IPv6 address.
+
+    """
+    parts = ipv6.split(":")
+    for part in parts:
+        if part == "0000":
+            parts[parts.index(part)] = "0"
+
+    is_zero = False
+    i = 0
+    while i < len(parts):
+        part = parts[i]
+        if part == "0":
+            parts.pop(i)
+            is_zero = True
+        elif is_zero:
+            parts.insert(i, "")
+            i = len(parts) # break
+        else:
+            i += 1
+
+    return ":".join(parts)
+
+def extend(ipv6: str) -> str:
+    """Extend an IPv6 address.
+
+    Args:
+        ipv6 (str): The IPv6 address to extend.
+
+    Returns:
+        str: The extended IPv6 address.
+
+    """
+    parts = ipv6.split(":")
+    i = 0
+    while i < len(parts):
+        if parts[i] == "":
+            parts[i] = "0000"
+            for _j in range(8 - len(parts)):
+                parts.insert(i, "0000")
+            i += 8 - len(parts)
+        elif parts[i] == "0":
+            parts[i] = "0000"
+            i += 1
+        else:
+            i += 1
+
+    return ":".join(parts)