diff --git a/bulk_dns_update.py b/bulk_dns_update.py
new file mode 100644
index 0000000..d4d54ea
--- /dev/null
+++ b/bulk_dns_update.py
@@ -0,0 +1,146 @@
+#!/usr/bin/python3
+'''
+Cloudflare bulk DNS A record updater.
+
+Designed to easily update all A records in cloudflare
+from one IP to another. Usually after a new IP is
+leased by ISP.
+
+BEFORE RUNNING replace API_KEY with a key that holds
+permission: DNS:Edit for one or more zones.
+'''
+
+import re
+import requests
+
+API_KEY = ''
+
+
+def setAPIKey(apiKey):
+    global API_KEY
+    API_KEY = apiKey
+
+
+def cloudflareRequest(url):
+    headers = {
+        'Authorization': 'Bearer {}'.format(API_KEY),
+        'Content-Type': 'application/json'
+    }
+
+    r = requests.get(url, headers=headers)
+    return r.json()
+
+
+def cloudflareUpdateRequest(url, data):
+    headers = {
+        'Authorization': 'Bearer {}'.format(API_KEY),
+        'Content-Type': 'application/json'
+    }
+
+    r = requests.patch(url, headers=headers, json=data)
+    return r.json()
+
+
+def getZoneInfo(zone):
+    return {
+        'name': zone['name'],
+        'id': zone['id']
+    }
+
+
+def getRecordInfo(record):
+    return {
+        'content': record['content'],
+        'name': record['name'],
+        'id': record['id'],
+        'ttl': record['ttl'],
+        'proxied': record['proxied']
+    }
+
+
+def getZones():
+    url = 'https://api.cloudflare.com/client/v4/zones'
+    data = cloudflareRequest(url)
+
+    if data['success'] is False:
+        print('Request to cloudflare was unsuccessful, error:')
+        print(data['errors'])
+        raise Exception('Unexpected Cloudflare error! Check logs.')
+
+    if data['result'] is None or len(data['result']) < 1:
+        # TODO
+        print('no zones!')
+
+    zones = list(map(lambda zone: getZoneInfo(zone), data['result']))
+    return zones
+
+
+def getRecordsForZone(zoneId):
+    url = 'https://api.cloudflare.com/client/v4/zones/{}/dns_records?type=A'.format(zoneId)
+    data = cloudflareRequest(url)
+
+    if data['success'] is False:
+        print('Request from cloudflare was unsuccessful, error:')
+        print(data['errors'])
+        raise Exception('Unexpected Cloudflare error! Check logs.')
+
+    if data['result'] is None or len(data['result']) < 1:
+        # TODO
+        print('no records!')
+
+    records = list(map(lambda record: getRecordInfo(record), data['result']))
+    return records
+
+
+def getDDNSAddresszoneId(ddnsZone):
+    records = getRecordsForZone(ddnsZone)
+
+    for record in records:
+        if not re.match(r"^addr\.", record['name']):
+            continue
+        return record
+
+    raise Exception('No ddns record found for zone: {}'.format(DDNS_ZONE))
+
+
+def updateRecord(zoneId, recordId, name, newIP, ttl, proxied):
+    url = 'https://api.cloudflare.com/client/v4/zones/{}/dns_records/{}'.format(zoneId, recordId)
+    data = {
+        'type': 'A',
+        'name': name,
+        'content': newIP,
+        'ttl': ttl,
+        'proxied': proxied
+    }
+
+    response = cloudflareUpdateRequest(url, data)
+    print('\tRecord updated: {}'.format('✅' if response['success'] is True else '❌'))
+
+
+def getMatchingRecordsForZone(zoneId, oldIP):
+    records = getRecordsForZone(zoneId)
+    return list(filter(lambda record: record['content'] == oldIP, records))
+
+
+def updateZone(zone, oldIP, newIP):
+    print('Updating records for {}'.format(zone['name']))
+    records = getMatchingRecordsForZone(zone['id'], oldIP)
+    if len(records) < 1:
+        print('No matching records for {}\n'.format(zone['name']))
+        return
+
+    for record in records:
+        print('\tRecord {}: {} -> {}'.format(record['name'], record['content'], newIP))
+        updateRecord(zone['id'], record['id'], record['name'], newIP, record['ttl'], record['proxied'])
+
+def updateAllZones(oldIP, newIP):
+    zones = getZones()
+
+    for zone in zones:
+        updateZone(zone, oldIP, newIP)
+
+if __name__ == '__main__':
+    oldIP = input('Old IP address: ')
+    newIP = input('New IP address: ')
+
+    updateAllZones(oldIP, newIP)
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..9a55304
--- /dev/null
+++ b/main.py
@@ -0,0 +1,48 @@
+import os
+import requests
+from bulk_dns_update import updateAllZones, setAPIKey, getDDNSAddresszoneId
+from dotenv import load_dotenv
+
+load_dotenv()
+
+currentIP = None
+DDNS_ZONE = os.getenv('DDNS_ZONE')
+
+
+def publicAddress():
+    global currentIP
+    print('Getting public IP from ifconfg.me...')
+
+    r = requests.get('https://ifconfig.me')
+    currentIP = r.text
+    print('Public IP: {}'.format(currentIP))
+
+
+def cloudflareDDNS():
+    print('Checking IP recorded in Cloudflare...')
+    ddnsRecord = getDDNSAddresszoneId(DDNS_ZONE)
+    recordedIP = ddnsRecord['content']
+    print('Found ddns recorded IP: {}'.format(recordedIP))
+
+    if currentIP != recordedIP:
+        print('Public IP has changed, updating all A records.')
+        updateAllZones(recordedIP, currentIP)
+    else:
+        print('is same, exiting')
+
+
+def main():
+    apiKey = os.getenv('API_KEY')
+    if apiKey is None:
+        raise Exception('In .env file or environment set Cloudflare variable: API_KEY')
+    if DDNS_ZONE is None:
+        raise Exception('In .env file or environment; set Cloudflare zone where addr. points to current IP.')
+
+    setAPIKey(apiKey)
+
+    publicAddress()
+    cloudflareDDNS()
+
+
+if __name__ == '__main__':
+    main()