A line is a phone you can check.
Each Ostra line is one physical iPhone with one SIM, assigned to you alone. You get its number, its proxy ports and a page that says whether it is working, from a probe through its port about once a minute.
Every account gets the dashboard, with the sandbox line. Each line you order appears in it when it is assigned to you.
Working on Verizon.
A probe went through the port just now and left from Verizon’s network.
- IPv4
- 198.51.100.23AS6167 · seen 1 min ago
- IPv6
- 2001:db8:4f::17AS6167 · seen 1 min ago
How a line is checked
- Last probe
- Just now
- Exit last seen
- 1 min ago
Ostra sends a probe through the line’s port about once a minute. It reads Working only while a probe went through in the last 3 minutes and left from Verizon’s network.
What comes with a line
Everything below belongs to the one line, for as long as it is yours. Nothing is shared with another customer.
- Its number
- The SIM’s own mobile number. Texts and calls to it reach you; it never texts or calls anyone. When the line ends, the number is deleted and never given to another Ostra customer.
- Three proxy ports
- HTTPS with a username and secret. SOCKS5 and HTTP for the source addresses you list. Ports by line ID
- Its exit address
- On the line’s carrier network, IPv4 and IPv6.
- A new carrier IP
- On request, within the line’s limits. Ostra’s recovery can also use one when the line loses IPv4 or IPv6. How it works
- Connection records
- Every connection the line made while it was yours: time, your client’s address, destination host and port, and bytes. Export them for your own compliance review.
- The API and webhooks
- The line’s status and its texts and codes, from your code or your agent. Its calls the same way. API and MCP
The line page
One page per line in the dashboard. It answers first whether the line is working, then lets you act on it.
- Overview
Status, with its evidence
One word for its state, the same in the dashboard, the apps and the extension: Working, Down, No recent probe or Suspended, with when a probe last went through and the exit addresses it saw. A line without a confirmed probe in the last 3 minutes never reads Working. When it is not working, the page says what Ostra is doing and what you can do.
- Inbox
Texts and calls, closed until opened
Newest first, with the latest code on top. Who sent it or called, and when; a text’s body and a call’s keyed digits stay closed until someone on your team opens them, and the opening is recorded. A code Ostra read is shown for 15 minutes. With ringing turned on in a browser, calls to the line ring the dashboard there.
- Records
Connection records
Pick a range, read or export them as CSV.
- Action
A new carrier IP, with its limits in view
It asks first and names the limits: one every 5 minutes, 24 in any 24 hours, and none for an hour after one that left the line much slower. Over them, it says when the next is allowed.
- Access
Access
The HTTPS username and a new secret when you need one (shown once). The addresses SOCKS5 and HTTP answer.
The line report
What the line is and what the internet sees about it. Each answer is shown as its source gave it.
- Number
- Line type and carrier, as the number lookup reports them.
- Exit address
- The IPv4 and IPv6 address and the network that owns each, seen through the line.
- Reputation
- Whether the address is on a public blocklist. A listing reaches Ostra’s abuse desk first, then you.
- Your browser
- Ostra’s check page, opened through the line, shows what your own browser sends. It describes your browser, not the line.
The sandbox
LAX-SANDBOX-00 is a simulator for building against the API before a line is yours. It has no phone, no SIM and no proxy, so no traffic leaves through it. Its addresses are documentation addresses, and its texts come from the simulator when you ask for one.
- Who can use it
- Every account, verified or not, from the day it opens.
- What it is not
- A trial line. Ostra has no free or trial lines. 2.6 No trial lines
Who gets a line
Individuals and businesses in the United States, once Ostra’s sign-up check approves them, for one stated use per line. There is no fixed number of lines: order as many as are ready, and an order that would take you above 5 lines is checked by a person at Ostra first.
Your own service
An account, service, domain or app you or your business owns or operates.
Written permission to test
A service whose operator has given you written permission to test it.
The line’s own number
Codes that confirm the number Ostra issued to you.
A line that is ready is assigned at once; otherwise the order waits for a line to be provisioned, and nothing is charged until one is assigned. Create an account, or read Verification.