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Geographic and segment information: (Tables) | 6 Months Ended
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Jun. 30, 2025
Geographic and segment information: |
Schedule of service revenues and long-lived assets by geographic region | Revenues are attributed to regions based on where the services are provided. Below are the Company’s service revenues and long-lived assets by geographic region - including property plant and equipment and excluding intangible assets (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenues |  | On-net |  | Off-net |  | Wavelength |  | Non-core |  | Total
North America | ​ | $ | 100,102 | ​ | $ | 95,842 | ​ | $ | 8,814 | ​ | $ | 2,605 | ​ | $ | 207,363
Europe | ​ |  | 25,174 | ​ | ​ | 5,087 | ​ | ​ | 231 | ​ | ​ | 54 | ​ | ​ | 30,546
South America | ​ | ​ | 1,889 | ​ | ​ | 207 | ​ | ​ | — | ​ | ​ | 8 | ​ | ​ | 2,104
Oceania | ​ | ​ | 5,038 | ​ | ​ | 1,016 | ​ | ​ | 12 | ​ | ​ | 15 | ​ | ​ | 6,081
Africa | ​ | ​ | 128 | ​ | ​ | 25 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 153
Total | ​ | $ | 132,331 | ​ | $ | 102,177 | ​ | $ | 9,057 | ​ | $ | 2,682 | ​ | $ | 246,247
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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended June 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenues |  | On-net |  | Off-net |  | Wavelength |  | Non-core |  | Total
North America | ​ | $ | 111,360 | ​ | $ | 104,734 | ​ | $ | 3,625 | ​ | $ | 4,468 | ​ | $ | 224,187
Europe | ​ | ​ | 23,142 | ​ | ​ | 5,220 | ​ | ​ | — | ​ | ​ | 104 | ​ | ​ | 28,466
South America | ​ | ​ | 1,721 | ​ | ​ | 221 | ​ | ​ | — | ​ | ​ | 17 | ​ | ​ | 1,959
Oceania | ​ | ​ | 4,395 | ​ | ​ | 1,252 | ​ | ​ | — | ​ | ​ | 21 | ​ | ​ | 5,668
Africa | ​ | ​ | 139 | ​ | ​ | 24 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 163
Total | ​ | $ | 140,757 | ​ | $ | 111,451 | ​ | $ | 3,625 | ​ | $ | 4,610 | ​ | $ | 260,443
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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six Months Ended June 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenues |  | On-net |  | Off-net |  | Wavelength |  | Non-core |  | Total
North America | ​ | $ | 199,183 | ​ | $ | 196,862 | ​ | $ | 15,705 | ​ | $ | 5,544 | ​ | $ | 417,294
Europe | ​ | ​ | 48,943 | ​ | ​ | 10,049 | ​ | ​ | 447 | ​ | ​ | 106 | ​ | ​ | 59,545
South America | ​ | ​ | 3,652 | ​ | ​ | 415 | ​ | ​ | — | ​ | ​ | 17 | ​ | ​ | 4,084
Oceania | ​ | ​ | 9,943 | ​ | ​ | 2,075 | ​ | ​ | 23 | ​ | ​ | 43 | ​ | ​ | 12,084
Africa | ​ | ​ | 240 | ​ | ​ | 51 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 291
Total | ​ | $ | 261,961 | ​ | $ | 209,452 | ​ | $ | 16,175 | ​ | $ | 5,710 | ​ | $ | 493,298
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Six Months Ended June 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Revenues |  | On-net |  | Off-net |  | Wavelength |  | Non-core |  | Total
North America | ​ | $ | 220,054 | ​ | $ | 215,753 | ​ | $ | 6,952 | ​ | $ | 10,348 | ​ | $ | 453,107
Europe | ​ | ​ | 46,783 | ​ | ​ | 10,559 | ​ | ​ | — | ​ | ​ | 225 | ​ | ​ | 57,567
South America | ​ | ​ | 3,469 | ​ | ​ | 456 | ​ | ​ | — | ​ | ​ | 26 | ​ | ​ | 3,951
Oceania | ​ | ​ | 8,776 | ​ | ​ | 2,812 | ​ | ​ | — | ​ | ​ | 52 | ​ | ​ | 11,640
Africa | ​ | ​ | 300 | ​ | ​ | 48 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 348
Total | ​ | $ | 279,382 | ​ | $ | 229,628 | ​ | $ | 6,952 | ​ | $ | 10,651 | ​ | $ | 526,613
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2025 |  | 2024
Long-lived assets, net | ​ | ​ | ​ | ​ | ​ | ​
North America | ​ | $ | 1,590,434 | ​ | $ | 1,579,495
Europe and other | ​ |  | 190,584 | ​ | ​ | 158,854
Total | ​ | $ | 1,781,018 | ​ | $ | 1,738,349

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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