Analytics platform Kpler recorded at least 37 crossings on Monday, one week after a memorandum of understanding was reached between the United States and Iran.
AXSMarine, another shipping data provider that tracks transits by commercial vessels including container ships, counted 42 crossings on Monday, also a record.
AFP found 51 different vessels transiting by cross-referencing the two lists.
This represents 42.5 percent of normal peacetime traffic (around 120 vessels per day) through the strategic waterway, which normally carries around a fifth of the world's oil and gas exports.
Total figures are likely to rise further, as the platforms often identify additional crossings retrospectively, notably through satellite imagery.
Five empty liquefied natural gas (LNG) tankers were among the ships crossing on Monday, according to Kpler.
"This may be one of the clearest signs so far of a tentative normalisation in traffic," Mihail Todorov of AXSMarine told AFP.
LNG operators had previously been very cautious about transiting the strait.
Overall commodities traffic through the strait, which includes tankers carrying oil and LNG plus dry bulk cargoes such as fertilisers, has increased steadily since Washington and Tehran reached an agreement last week to end the war.
Before the June 14 agreement, less than 10 commodity vessels went through the strait per day since the passage was closed by Iran on March 1 in retaliation against US and Israeli strikes.
Since June 15, the average has risen to 21, and reached 28 over the last five days.
Full normalisation, however, is still a long way off, according to Deepak Maurya, an analyst at HSBC. "We expect shipping normalisation to lag pending a durable settlement, mine clearance and lower insurance costs," he wrote in a report on Tuesday.
Control of the strait
Whether Iran will administer the vital passage remains one of the key questions in the talks set for the next two months.
"The Strait of Hormuz will never return to its pre-war conditions and will be administered by the Islamic Republic of Iran, in accordance with international law," Iran's chief negotiator Mohammad Bagher Ghalibaf said during negotiations in Switzerland, state media reported Tuesday.
The Islamic Republic announced Saturday that it had closed the strait again in response to Irsael's attacks on Lebanon.
Oman and Iran emphasised "sovereign rights over their territorial waters in the Strait of Hormuz" in a joint statement Tuesday, saying they will study the future administration of the strait and potential costs to be charged.
The US, on the other hand, said on Monday it was temporarily lifting sanctions on Iran to let it produce, sell and deliver crude oil and related products through August 21.
In a Truth Social post on Tuesday Trump said that US Navy forces would no longer blockade the Strait of Hormuz, but that ships would remain in the region.
"All ships are remaining in place should it be necessary to reinstitute the Blockade, which seems, at this point, highly unlikely," the post said.
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