Flag an IP lookup with one Slack reaction
A reaction can be your lightweight signal that an IP needs investigation, letting Notis retrieve hosted domains without another task entry.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Hosted Domains Lookup
Tool to retrieve hosted domains for a given IP address. Use this after validating the IP.
Why this helps
Tracking each small technical request in a separate list adds friction and increases the chance of missed research.
- Mark an IP message for action without composing another request.
- Keep the lookup attached to its original context.
- Reduce manual tracking for quick research steps.
Setup
Build it in a few focused steps.
- 1Connect Slack and Ip2whois to Notis once in the portal.
- 2Create an automation in the portal, or ask Notis to look up hosted domains when you react to a message containing an IP.
- 3State in one plain-language prompt how to identify the intended IP and when to run the lookup.
- 4Choose the Slack reaction-added trigger with your emoji filter, select a run-report channel, and test with a valid IP message.
Questions about this workflow
Can I use a particular emoji as the signal?
Yes. The Slack reaction-added trigger supports an optional emoji filter.
What if the message has no valid IP?
The action requires a valid IP. Make the prompt specific about what to do when the message does not contain one.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Ip2whois. A trigger fires from one place; an action lands in another.
Slack triggers
Ip2whois actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
IP2WHOIS Domain Lookup
Tool to retrieve WHOIS information for a domain. Use when you need registrar and contact details for a specific domain.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Hosted Domains Lookup
Tool to retrieve hosted domains for a given IP address. Use this after validating the IP.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slack and Ip2whois, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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No card. Works with personal or business Ip2whois.