The Blocked Numbers page is your spam filter hub for every inbound call and text. Three tools live here, and you can use them together for layered protection:
1. Manual Block List — add individual numbers one at a time. Use it for that one persistent telemarketer who keeps calling.
2. Auto-Block Suspicious Carriers — a single toggle that auto-rejects calls from known VOIP marketing carriers (Onvoy, Sinch, etc.) that telemarketers and spammers commonly use. Catches most spam without you lifting a finger.
3. Auto Spam Detection — rule-based blocking. Set up patterns like "block any number that calls 5 times in 60 minutes" or "block any number that calls 10 times in 1 minute". Perfect for catching auto-dialers and spam bursts the carrier filter misses.
1. Open Blocked Numbers
You'll find Blocked Numbers under Settings. The page is split into three cards: Add Single Number, Auto-Block Suspicious Carriers, and Auto Spam Detection.
2. The Add Single Number card
This is the manual path. Use it for one-off numbers you want to block immediately — a stalker, a problem ex-customer, a persistent telemarketer.
3. Enter the phone number
Type the number you want to block. The optional Reason field below lets you leave a short note ("Spam", "Wrong number", "Asked to be removed") so your team knows the context if they ever look at the list.
4. Click Block Number
The number is added to your block list immediately. No more calls or texts from that number reach you or your team.
5. Review your blocked list
The blocked list shows who blocked each number, the reason, and when. Use the search box to find a specific number, or hit Export to download the whole list as CSV (useful for audits or moving to another platform).
6. Turn on Auto-Block Suspicious Carriers
This single toggle is one of the most powerful spam tools in Joby. It auto-rejects every inbound call coming from VOIP marketing carriers like Onvoy and Sinch — the cheap voice providers telemarketers, robo-dialers, and scammers use to flood numbers. Real customer numbers come from regular cell or landline carriers, so this won't block them. You can confidently leave this on.
7. Flip the toggle
The block kicks in immediately for every new inbound call from a flagged carrier. There's no setup, no rules to write — it's a hard ban on the entire carrier.
8. Click Add Rule under Auto Spam Detection
Auto Spam Detection is rule-based — you define a call pattern and Joby auto-blocks anyone matching it. Click Add Rule to set up your first one. Common examples: "block any number that calls 5 times in 60 minutes" or "block any number that calls 10 times in 1 minute."
9. Pick Frequency Based
Frequency Based rules block any number that calls more than X times in a Y-minute window. This is the most useful rule type for most businesses — auto-dialers and spam bots almost always exhibit this pattern, while real customers rarely call back-to-back-to-back.
10. Set the rule details
Set Call Count Threshold and Time Window (minutes). Defaults are 5 calls in 60 minutes — a good baseline. For tighter blocking on suspected bots, lower it to 3 calls in 5 minutes. For looser, more conservative blocking, raise to 10 calls in 60 minutes.
11. Name your rule
Pick a name you'll recognize later when reviewing or editing — "High Frequency Callers", "Bot Detector", "10-in-1-min". Use multiple rules with different names if you want layered detection (e.g., one tight "5-in-5-min" rule and a looser "15-in-60-min" backstop).
12. Click Create Rule
The rule goes live immediately. Joby starts watching call patterns in real time and auto-blocks any number that crosses the threshold. Blocked numbers from rules show up in your main Blocked Numbers list with the rule name as the reason.
13. Manage your rules from the Auto Spam Detection card
The card shows every active rule, how many numbers each has caught ("0 blocked"), and a toggle to pause a rule without deleting it — useful if a rule is too aggressive and catching real customers. Active Rules and Total Blocked counters at the top give you a quick snapshot.
