diff --git a/README.rst b/README.rst
index 2ffcd37..fd6685a 100644
--- a/README.rst
+++ b/README.rst
@@ -17,7 +17,7 @@ Or use the latest version from the master (if you are brave enough)::
 Using aioping
 -------------
 
-There are 2 ways to use the library.
+There are 3 ways to use the library.
 
 First one is interactive, which sends results to standard Python logger.
 Please make sure you are running this code under root, as only
@@ -30,10 +30,9 @@ root is allowed to send ICMP packets:
     import logging
 
     logging.basicConfig(level=logging.INFO)     # or logging.DEBUG
-    loop = asyncio.get_event_loop()
-    loop.run_until_complete(aioping.verbose_ping("google.com"))
+    asyncio.run(aioping.verbose_ping("google.com"))
 
-Alternatively, you can call a ping function, which returns a
+Secondly, you can call a ping function, which returns a
 ping delay in milliseconds or throws an exception in case of
 error:
 
@@ -44,14 +43,31 @@ error:
 
     async def do_ping(host):
         try:
-            delay = await aioping.ping(host) * 1000
+            delay = await aioping.ping(host)
             print("Ping response in %s ms" % delay)
 
         except TimeoutError:
             print("Timed out")
 
-    loop = asyncio.get_event_loop()
-    loop.run_until_complete(do_ping("google.com"))
+    asyncio.run(do_ping("google.com"))
+    
+The last way is to call a multiping function, which returns a
+list of tuples. The tuples are formatted as (dest_addr, delay) with 
+delay measured in milliseconds. In the event of a timeout, the tuple 
+will be returned as (dest_addr, 'TimeoutError'). Lowering the timeout 
+will result in a faster return. NOTE: This function is limited to 255
+pings at one time due to the limitation of select().
+
+.. code:: python
+
+    import asyncio
+    import aioping
+    
+    async def do_multiping():
+        results = await aioping.multiping(['8.8.8.8','1.1.1.1','google.com'])
+        print(results)
+        
+    asyncio.run(do_multiping())
 
 Methods
 -------
@@ -70,6 +86,13 @@ Methods
 - ``count`` - count of packets to send (default: ``3``)
 - ``family`` - family of resolved address - ``socket.AddressFamily.AF_INET`` for IPv4, ``socket.AddressFamily.AF_INET6``
   for IPv6 or ``None`` if it doesn't matter (default: ``None``)
+  
+``multiping(dest_addr, timeout=5, family=None)``
+
+- ``dest_addr`` - destination address, IPv4, IPv6 or hostname
+- ``timeout`` - timeout in seconds (default: ``5``)
+- ``family`` - family of resolved address - ``socket.AddressFamily.AF_INET`` for IPv4, ``socket.AddressFamily.AF_INET6``
+  for IPv6 or ``None`` if it doesn't matter (default: ``None``)
 
 Credits
 -------
diff --git a/aioping/__init__.py b/aioping/__init__.py
index d594d62..6d0a227 100644
--- a/aioping/__init__.py
+++ b/aioping/__init__.py
@@ -104,7 +104,7 @@
 proto_icmp6 = socket.getprotobyname("ipv6-icmp")
 
 
-def checksum(buffer):
+def _checksum(buffer):
     """
     I'm not too confident that this is right but testing seems
     to suggest that it gives the same answers as in_cksum in ping.c
@@ -136,7 +136,7 @@ def checksum(buffer):
     return answer
 
 
-async def receive_one_ping(my_socket, id_, timeout):
+async def _receive_one_ping(my_socket, id_, timeout):
     """
     receive the ping from the socket.
     :param my_socket:
@@ -170,7 +170,7 @@ async def receive_one_ping(my_socket, id_, timeout):
                     data = rec_packet[offset + 8:offset + 8 + struct.calcsize("d")]
                     time_sent = struct.unpack("d", data)[0]
 
-                    return time_received - time_sent
+                    return (time_received - time_sent) * 1000
 
     except asyncio.TimeoutError:
         asyncio.get_event_loop().remove_writer(my_socket)
@@ -180,7 +180,7 @@ async def receive_one_ping(my_socket, id_, timeout):
         raise TimeoutError("Ping timeout")
 
 
-def sendto_ready(packet, socket, future, dest):
+def _sendto_ready(packet, socket, future, dest):
     try:
         socket.sendto(packet, dest)
     except (BlockingIOError, InterruptedError):
@@ -193,7 +193,7 @@ def sendto_ready(packet, socket, future, dest):
         future.set_result(None)
 
 
-async def send_one_ping(my_socket, dest_addr, id_, timeout, family):
+async def _send_one_ping(my_socket, dest_addr, id_, timeout, family):
     """
     Send one ping to the given >dest_addr<.
     :param my_socket:
@@ -215,7 +215,7 @@ async def send_one_ping(my_socket, dest_addr, id_, timeout, family):
     data = struct.pack("d", default_timer()) + data.encode("ascii")
 
     # Calculate the checksum on the data and the dummy header.
-    my_checksum = checksum(header + data)
+    my_checksum = _checksum(header + data)
 
     # Now that we have the right checksum, we put that in. It's just easier
     # to make up a new header than to stuff it into the dummy.
@@ -225,7 +225,7 @@ async def send_one_ping(my_socket, dest_addr, id_, timeout, family):
     packet = header + data
 
     future = asyncio.get_event_loop().create_future()
-    callback = functools.partial(sendto_ready, packet=packet, socket=my_socket, dest=dest_addr, future=future)
+    callback = functools.partial(_sendto_ready, packet=packet, socket=my_socket, dest=dest_addr, future=future)
     asyncio.get_event_loop().add_writer(my_socket, callback)
 
     await future
@@ -282,8 +282,8 @@ async def ping(dest_addr, timeout=10, family=None):
 
     my_id = uuid.uuid4().int & 0xFFFF
 
-    await send_one_ping(my_socket, addr, my_id, timeout, family)
-    delay = await receive_one_ping(my_socket, my_id, timeout)
+    await _send_one_ping(my_socket, addr, my_id, timeout, family)
+    delay = await _receive_one_ping(my_socket, my_id, timeout)
     my_socket.close()
 
     return delay
@@ -310,5 +310,46 @@ async def verbose_ping(dest_addr, timeout=2, count=3, family=None):
             break
 
         if delay is not None:
-            delay *= 1000
             logger.info("%s get ping in %0.4fms" % (dest_addr, delay))
+
+
+async def _do_multiping(dest_addr, timeout=5, family=None):
+    """
+    Execute the ping of a single address for multiping function
+    """
+
+    try:
+        delay = await ping(dest_addr, timeout, family)
+        return (dest_addr, delay)
+
+    except TimeoutError:
+        return (dest_addr, 'TimeoutError')
+
+
+async def _multiping_sem(dest_addr, sem, timeout=5, family=None):
+    """
+    run the multiping with asyncio.Semaphore limit of 255
+    """
+    
+    async with sem:
+        return await _do_ping_sem(dest_addr, timeout, family)
+
+
+async def multiping(dest_addr, timeout=5, family=None):
+    """
+    Returns tuple (dest_addr, delay) for each ip address
+    or domain submitted in a list. Will return 
+    (dest_addr, 'TimeoutError') if ping times out.
+    """
+
+    # limit because of select()
+    if len(dest_addr) > 255:
+        sem = asyncio.Semaphore(255)
+        tasks = [_multiping_sem(x, sem, timeout, family) for x in dest_addr]
+    
+    # no limit if pinging less than 255 addresses
+    else:
+        tasks = [_do_multiping(x, timeout, family) for x in dest_addr]
+
+    return await asyncio.gather(*tasks)
+    
diff --git a/aioping/tests/test_aioping.py b/aioping/tests/test_aioping.py
index 09ff87f..95fd5ba 100644
--- a/aioping/tests/test_aioping.py
+++ b/aioping/tests/test_aioping.py
@@ -1,6 +1,6 @@
 from unittest import TestCase
 import asyncio
-from aioping import verbose_ping, ping
+from aioping import verbose_ping, ping, multiping
 import logging
 import socket
 
diff --git a/setup.py b/setup.py
index cf47625..cb9a8f5 100644
--- a/setup.py
+++ b/setup.py
@@ -4,13 +4,13 @@
 setup(
     name="aioping",
     packages=["aioping"],
-    version="0.3.1",
+    version="0.4.1",
     install_requires=["async_timeout", "aiodns"],
     description="Asyncio ping implementation",
     author="Anton Belousov",
     author_email="anton@stellarbit.com",
     url="https://github.com/stellarbit/aioping",
-    download_url="https://github.com/stellarbit/aioping/tarball/0.3.1",
+    download_url="https://github.com/stellarbit/aioping/tarball/0.4.1",
     keywords=["network", "icmp", "ping", "asyncio"],
     classifiers=[
         "Development Status :: 4 - Beta",