What actually makes a number kosher?
A kosher number isn't a special category of digits — it's a regular Israeli mobile number that a carrier has provisioned as a kosher line: data and SMS excluded at the network level, recognized under the standards set by Vaadat Harabanim L'inyanei Tikshoret (the Rabbinical Committee for Communications). The prefix is simply a byproduct of how carriers allocate blocks of numbers to their kosher lines, which makes it a genuinely useful visual clue — but the real answer lives in the carrier's own records, not in the digits alone.
That distinction matters most when a number changes hands. A kosher-range prefix on a number that's since been reassigned to a regular line won't behave as kosher, and — as we found out directly while testing a kosher port-in ourselves — a number that was never provisioned as kosher at its original carrier generally can't simply become kosher by porting it somewhere else. More on that below.
What are the kosher number prefixes by carrier?
These are the prefix ranges the major Israeli carriers use for kosher lines. The "X" is a wildcard digit — for example, 058-32X-XXXX covers every number from 058-320-XXXX through 058-329-XXXX.
| Carrier | Kosher prefix range |
|---|---|
| Golan Telecom | 058-32X-XXXX |
| Pelephone | 050-41X-XXXX |
| Cellcom | 052-71X-XXXX and 052-76X-XXXX |
| Hot Mobile | 053-31X-XXXX, 053-41X-XXXX, and 053-51X-XXXX |
| Partner | 054-84X-XXXX and 054-85X-XXXX |
If your number matches one of these ranges, it's very likely a kosher line on that carrier.
What about the smaller resellers on the 055 prefix?
A handful of smaller Israeli resellers (Rami Levy, Free Telecom, and others) also offer kosher lines, generally out of the shared 055 prefix block. We're intentionally not publishing exact sub-ranges for these here: 055 is a large block shared by many small MVNOs, sub-range assignments shift more often than the big five carriers above, and we found at least one public source with an internal inconsistency in its own numbers for a smaller reseller. If your number starts with 055 and isn't clearly explained by the table above, the reliable move is to ask that specific carrier directly rather than trust a prefix list — this is exactly the kind of detail worth getting from the source, not a table on the internet.
What happens if a kosher SIM ends up in a regular phone?
It locks. A kosher SIM card placed in a non-kosher (regular smartphone) will lock itself, and getting service back means a new SIM card, not just moving it back. This runs in the other direction too in practice — kosher phones are certified hardware built for kosher lines, carrying the "Meushar" (approved) certification mark, and the two are designed to be used together, not mixed and matched.
The practical takeaway: don't test a kosher SIM in a spare regular phone just to check if a line is working. If you need to confirm a line is active, ask the carrier or check with support instead.
Can a kosher number be ported to a different kosher carrier?
Yes — moving a kosher number from one kosher-certified carrier to another is a normal, supported operation, the same as porting any other Israeli mobile number between carriers.
What doesn't work the way people sometimes expect: taking an ordinary, never-kosher number and porting it in hoping it "becomes" kosher on arrival. We tested this directly, and a regular number was rejected for a kosher line with the carrier's system flagging that the number itself wasn't eligible — even with everything else set up correctly on our end. The honest read is that kosher status is tied to the number's standing at its current carrier, not something a new carrier can simply assign to any number handed to it. If your goal is a kosher number and your current one was never kosher, a fresh kosher number is the reliable path, not a port.
Switching to BitLink with an existing kosher number
If your number matches one of the ranges above, BitLink's kosher plans support porting it in the normal kosher-to-kosher way — Kosher Basic at $19.99/month or Kosher+ at $24.99/month if US and Canada calling matters to you. Message support with your current carrier and number, and the team will confirm eligibility and handle the port. If you don't have a kosher number yet and want one, the same plans work with a freshly assigned kosher number instead — no port needed.
Quick answers
How can I tell if my Israeli number is kosher just from the digits?
Check the prefix against the major carriers' kosher ranges: Golan Telecom 058-32X, Pelephone 050-41X, Cellcom 052-71X/052-76X, Hot Mobile 053-31X/053-41X/053-51X, and Partner 054-84X/054-85X. A match is a strong sign, but the carrier's own records are the final word, since a number can theoretically be reassigned.
Can a regular (non-kosher) number become kosher by porting it to a kosher plan?
Generally no. Kosher status is tied to how the number is provisioned at its current carrier, not something a new carrier can assign on arrival — we confirmed this directly when a regular number was rejected for a kosher line. If your current number was never kosher, getting a freshly assigned kosher number is the reliable option, not porting your existing one.
What happens if I put a kosher SIM in a regular smartphone?
It locks, and you'll need a new SIM card to restore service — kosher SIMs and kosher-certified devices are designed to work together, not interchangeably with regular hardware.
Can I port my kosher number between two kosher carriers?
Yes — transferring a kosher number from one kosher-certified carrier to another is a normal, supported port, just like porting any other Israeli mobile number.
My number starts with 055 — is it kosher?
Possibly — several smaller resellers offer kosher lines on the shared 055 block, but exact sub-ranges shift more often than the major carriers' allocations and aren't reliable to publish as a fixed list. Ask that specific carrier directly to confirm.