The most common KTB email format is {first}@ktb.co.id (e.g. jane@ktb.co.id), used in about 93% of observed KTB work emails. KTB uses 5 address formats in total.
Most likely format — based on 204 observed addresses
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KTB email formats
93.1% of observed KTB addresses use the {first}@ format.
Email formatExampleShare
{first}@ktb.co.id
Examplejane@ktb.co.id
Share93.1%
{last}@ktb.co.id
Exampledoe@ktb.co.id
Share3.9%
{first}.{last}@ktb.co.id
Examplejane.doe@ktb.co.id
Share2.0%
{first}{last}@ktb.co.id
Examplejanedoe@ktb.co.id
Share0.5%
{f}{last}@ktb.co.id
Examplejdoe@ktb.co.id
Share0.5%
Derived from 204 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
Verify the pattern before you send
Start with the format that appears most often. For KTB, that means testing {first}@ktb.co.id first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common KTB email format is {first}@ktb.co.id (for example jane@ktb.co.id), used in about 93% of observed KTB work addresses. KTB also uses 4 other formats for name collisions.
How accurate is this KTB email format?
This format is derived from 204 real KTB addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's KTB email?
Apply the most common pattern to the person's name (e.g. jane@ktb.co.id), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does KTB use?
Beyond {first}@ktb.co.id, observed formats include {last}@ktb.co.id, {first}.{last}@ktb.co.id, {first}{last}@ktb.co.id, {f}{last}@ktb.co.id, in descending order of frequency.
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