diff --git a/python/eth_contract_registry/registry.py b/python/eth_contract_registry/registry.py
index 6da5b7e..09d321d 100644
--- a/python/eth_contract_registry/registry.py
+++ b/python/eth_contract_registry/registry.py
@@ -26,7 +26,10 @@ from hexathon import (
 from chainlib.eth.tx import TxFactory
 
 # local imports
-from .encoding import to_identifier
+from .encoding import (
+        to_identifier,
+        from_identifier_hex,
+        )
 
 logg = logging.getLogger(__name__)
 
@@ -148,3 +151,8 @@ class Registry(TxFactory):
         tx = self.set_code(tx, data)
         o['params'].append(self.normalize(tx))
         return o
+
+
+    @classmethod
+    def parse_identifier(self, v):
+        return from_identifier_hex(v)
diff --git a/python/eth_contract_registry/runnable/list.py b/python/eth_contract_registry/runnable/list.py
new file mode 100644
index 0000000..76c8b37
--- /dev/null
+++ b/python/eth_contract_registry/runnable/list.py
@@ -0,0 +1,100 @@
+"""Set identifier value on contract registry
+
+.. moduleauthor:: Louis Holbrook <dev@holbrook.no>
+.. pgp:: 0826EDA1702D1E87C6E2875121D2E7BB88C2A746 
+
+"""
+
+# standard imports
+import sys
+import os
+import json
+import argparse
+import logging
+
+# third-party imports
+from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
+from crypto_dev_signer.keystore.dict import DictKeystore
+from crypto_dev_signer.eth.helper import EthTxExecutor
+from chainlib.chain import ChainSpec
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.gas import RPCGasOracle
+from chainlib.eth.connection import EthHTTPConnection
+from chainlib.eth.tx import receipt
+from chainlib.eth.constant import ZERO_CONTENT
+from chainlib.error import JSONRPCException
+
+# local imports
+from eth_contract_registry import Registry
+
+logging.basicConfig(level=logging.WARNING)
+logg = logging.getLogger()
+
+script_dir = os.path.dirname(__file__)
+data_dir = os.path.join(script_dir, '..', 'data')
+
+default_format = 'terminal'
+
+argparser = argparse.ArgumentParser()
+argparser.add_argument('-p', '--provider', dest='p', default='http://localhost:8545', type=str, help='RPC provider url (http only)')
+argparser.add_argument('-i', '--chain-spec', dest='i', type=str, default='Ethereum:1', help='Chain specification string')
+argparser.add_argument('-r', '--registry', dest='r', required=True, type=str, help='Contract registry address')
+argparser.add_argument('-f', '--format', dest='f', type=str, default=default_format, help='Output format [human, brief]')
+argparser.add_argument('-v', action='store_true', help='Be verbose')
+argparser.add_argument('-vv', action='store_true', help='Be more verbose')
+argparser.add_argument('--env-prefix', default=os.environ.get('CONFINI_ENV_PREFIX'), dest='env_prefix', type=str, help='environment prefix for variables to overwrite configuration')
+argparser.add_argument('identifier', type=str, nargs='?', help='Token symbol to return address for')
+args = argparser.parse_args()
+
+if args.vv:
+    logg.setLevel(logging.DEBUG)
+elif args.v:
+    logg.setLevel(logging.INFO)
+
+chain_spec = ChainSpec.from_chain_str(args.i)
+chain_id = chain_spec.network_id()
+
+rpc = EthHTTPConnection(args.p)
+registry_address = args.r
+identifier = args.identifier
+fmt = args.f
+
+
+def out_element(e, fmt=default_format, w=sys.stdout):
+    logg.debug('format {}'.format(fmt))
+    if fmt == 'brief':
+        w.write(e[1] + '\n')
+    else:
+        w.write('{} {}\n'.format(e[0], e[1]))
+
+
+def element(ifc, identifier, fmt=default_format, w=sys.stdout):
+    o = ifc.address_of(registry_address, identifier)
+    r =  rpc.do(o)
+    address = ifc.parse_address_of(r)
+    out_element((identifier, address), fmt, w)
+
+
+def ls(ifc, fmt=default_format, w=sys.stdout):
+    i = 0
+    while True:
+        o = ifc.identifier(registry_address, i)
+        try:
+            r =  rpc.do(o)
+            identifier = ifc.parse_identifier(r)
+            element(ifc, identifier, fmt, w)
+            i += 1
+        except JSONRPCException:
+            break
+
+
+def main():
+    c = Registry()
+    if identifier != None:
+        element(c, identifier, fmt=fmt, w=sys.stdout)
+    else:
+        ls(c, fmt=fmt, w=sys.stdout)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python/gmon.out b/python/gmon.out
index 1e15995..55db042 100644
Binary files a/python/gmon.out and b/python/gmon.out differ
diff --git a/python/setup.cfg b/python/setup.cfg
index 8c0809c..43013ec 100644
--- a/python/setup.cfg
+++ b/python/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = eth-contract-registry
-version = 0.5.4a3
+version = 0.5.4a4
 description = Ethereum Smart Contract key-value registry
 author = Louis Holbrook
 author_email = dev@holbrook.no