heights.com

Klaviyo shared sending. 54 campaigns observed between 29 Sept 2025 and 26 Apr 2026.

What the mail shows

75 other senders have been seen on at least one of these IPs, though none matches the full pool.

14

IPs carrying this mail

75

Other companies on them

0

In the same pool

Who else sends from these IPs

and 35 more.

The Klaviyo pool this sits in · 5 brands · 33 addresses

These senders draw from near-identical sets of addresses, which is what sharing a pool means. Klaviyo publishes none of this. See every pool we have recovered.

The IPs, by how much of this mail each carried

14 of ~16 IPs seen. Klaviyo assigns a different IP per send, so this is the set drawn from, not an address. 170.203.28.2 carried 15% of what we saw, well above the 7% an even rotation would give it.

Sending over time

Stable in our sample: the same 14 addresses from first to last sighting, 7 months.

EACH ROW IS ONE ADDRESS, OLDEST FIRST · BAR = IN THE POOL · DARKER = MORE CAMPAIGNS170.203.28.2170.203.28.2 · kl-203-28-2 · carried this mail 25 Sept 25 to now · 8 campaigns170.203.28.2 · week of 25/09/2025 · 1 campaign170.203.28.2 · week of 16/10/2025 · 1 campaign170.203.28.2 · week of 30/10/2025 · 1 campaign170.203.28.2 · week of 11/12/2025 · 1 campaign170.203.28.2 · week of 25/12/2025 · 1 campaign170.203.28.2 · week of 01/01/2026 · 1 campaign170.203.28.2 · week of 29/01/2026 · 1 campaign170.203.28.2 · week of 26/02/2026 · 1 campaign8170.203.16.14170.203.16.14 · kl-203-16-14 · carried this mail 25 Sept 25 to now · 3 campaigns170.203.16.14 · week of 25/09/2025 · 1 campaign170.203.16.14 · week of 19/02/2026 · 1 campaign170.203.16.14 · week of 26/03/2026 · 1 campaign3170.203.20.11170.203.20.11 · kl-203-20-11 · carried this mail 25 Sept 25 to now · 7 campaigns170.203.20.11 · week of 25/09/2025 · 1 campaign170.203.20.11 · week of 09/10/2025 · 1 campaign170.203.20.11 · week of 20/11/2025 · 2 campaigns170.203.20.11 · week of 04/12/2025 · 1 campaign170.203.20.11 · week of 29/01/2026 · 1 campaign170.203.20.11 · week of 23/04/2026 · 1 campaign7170.203.24.3170.203.24.3 · kl-203-24-3 · carried this mail 2 Oct 25 to now · 3 campaigns170.203.24.3 · week of 02/10/2025 · 1 campaign170.203.24.3 · week of 26/02/2026 · 1 campaign170.203.24.3 · week of 19/03/2026 · 1 campaign3170.203.20.4170.203.20.4 · kl-203-20-4 · carried this mail 23 Oct 25 to now · 6 campaigns170.203.20.4 · week of 23/10/2025 · 1 campaign170.203.20.4 · week of 06/11/2025 · 1 campaign170.203.20.4 · week of 01/01/2026 · 2 campaigns170.203.20.4 · week of 05/02/2026 · 1 campaign170.203.20.4 · week of 09/04/2026 · 1 campaign6170.203.23.119170.203.23.119 · kl-203-23-119 · carried this mail 30 Oct 25 to now · 3 campaigns170.203.23.119 · week of 30/10/2025 · 1 campaign170.203.23.119 · week of 25/12/2025 · 1 campaign170.203.23.119 · week of 29/01/2026 · 1 campaign3170.203.20.3170.203.20.3 · kl-203-20-3 · carried this mail 20 Nov 25 to now · 4 campaigns170.203.20.3 · week of 20/11/2025 · 1 campaign170.203.20.3 · week of 18/12/2025 · 2 campaigns170.203.20.3 · week of 08/01/2026 · 1 campaign4170.203.24.11170.203.24.11 · kl-203-24-11 · carried this mail 27 Nov 25 to now · 3 campaigns170.203.24.11 · week of 27/11/2025 · 1 campaign170.203.24.11 · week of 04/12/2025 · 1 campaign170.203.24.11 · week of 01/01/2026 · 1 campaign3170.203.19.87170.203.19.87 · kl-203-19-87 · carried this mail 4 Dec 25 to now · 3 campaigns170.203.19.87 · week of 04/12/2025 · 1 campaign170.203.19.87 · week of 19/03/2026 · 1 campaign170.203.19.87 · week of 16/04/2026 · 1 campaign3170.203.27.148170.203.27.148 · kl-203-27-148 · carried this mail 11 Dec 25 to now · 1 campaigns170.203.27.148 · week of 11/12/2025 · 1 campaign1170.203.28.26170.203.28.26 · kl-203-28-26 · carried this mail 18 Dec 25 to now · 2 campaigns170.203.28.26 · week of 18/12/2025 · 1 campaign170.203.28.26 · week of 05/03/2026 · 1 campaign2170.203.16.11170.203.16.11 · kl-203-16-11 · carried this mail 1 Jan 26 to now · 7 campaigns170.203.16.11 · week of 01/01/2026 · 1 campaign170.203.16.11 · week of 29/01/2026 · 1 campaign170.203.16.11 · week of 12/02/2026 · 1 campaign170.203.16.11 · week of 19/02/2026 · 1 campaign170.203.16.11 · week of 26/02/2026 · 2 campaigns170.203.16.11 · week of 05/03/2026 · 1 campaign7149.72.90.8149.72.90.8 · o1396 · carried this mail 19 Feb 26 to now · 1 campaigns149.72.90.8 · week of 19/02/2026 · 1 campaign1170.203.24.21170.203.24.21 · kl-203-24-21 · carried this mail 26 Feb 26 to now · 3 campaigns170.203.24.21 · week of 26/02/2026 · 1 campaign170.203.24.21 · week of 26/03/2026 · 1 campaign170.203.24.21 · week of 02/04/2026 · 1 campaign3Sept 25Oct 25Dec 25Jan 26Feb 26Mar 26Apr 26

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