Top organizations by netblock count

The largest organisations in our index, ranked by number of registered netblocks. Last computed 2026-11-01.

This ranks individual registry-name clusters. Where one organisation holds space under several different names, browse organisation entities to see them grouped.

# Organisation Attribution Netblocks
301 British Telecommunications Limited GLEIF verified 1,254
302 ISPCUST 1,254
303 G-Core Labs S.A. GLEIF verified 1,251
304 Host Europe GLEIF verified 1,249
305 Vodafone GmbH ORG-MAT1-RIPE 1,249
306 A1MOBFIXIP-HWY-AT 1,245
307 Sr Net S.R.L. 1,243
308 ACE CDN ACE-SG 1,238
309 DATAFORSEO-OU GLEIF verified 1,236
310 ZSCALER, INC. GLEIF verified 1,229
311 Etihad Etisalat, a joint stock company 1,227
312 TTSL-ISP DIVISION 1,221
313 Sifyinfranet 1,217
314 Inter.link GmbH GLEIF verified 1,217
315 Vodafone Net Iletisim Hizmetler AS 1,217
316 iNet Ltd GLEIF verified 1,213
317 Leaseweb USA, Inc. 1,208
318 Datacom Group Ltd GLEIF verified 1,208
319 Telekomunikasi Indonesia (PT) ORG-TI10-AP 1,203
320 DigitalOcean, LLC GLEIF verified 1,203
321 Bezeq International Ltd. 1,200
322 FBTHREEZEROZERO 1,193
323 TDC-IPTV-NET 1,191
324 MASTER S/A GLEIF verified 1,188
325 HOSTKEY B.V. GLEIF verified 1,177
326 FASTWEB-POP-INTERNET 1,176
327 HERO TELECOMS (PTY) LTD 1,172
328 a26991340 1,172
329 AKAMAI-PA 1,172
330 NOERDNET-KUNDE 1,167
331 Telecom Italia Spa TELECOMITALIASPA 1,162
332 VOIPMEN 1,160
333 Contabo GmbH 1,153
334 ORG-NLTU1-RIPE 1,152
335 Locaweb Serviços de Internet S/A 1,152
336 Cloudfire s.r.l. 1,141
337 The Egyptian Company for Mobile Services (Mobinil) 1,141
338 Etihad GO Company For communications 1,138
339 Orange Côte d'Ivoire 1,138
340 JSC Kazakhtelecom GLEIF verified 1,137
341 TurkNet Iletisim Hizmetleri A.S. GLEIF verified 1,136
342 Saudi Telecom Company JSC ORG-SSTC1-RIPE 1,136
343 Netskope Inc GLEIF verified 1,130
344 CHINANET-FJ 1,128
345 Kar-Tel LLC 1,122
346 RapidSeedbox Ltd 1,117
347 Cablemas Telecomunicaciones SA de CV GLEIF verified 1,114
348 EE-ESTPAK 1,113
349 Cyber Internet Services (Private) Limited 1,098
350 Telecom Italia S.p.A. ORG-IA34-RIPE 1,098
351 Free SAS GLEIF verified 1,094
352 DoD Network Information Center 1,092
353 HOS-1109035 1,076
354 EGIHosting 1,075
355 A1TA-HWY-AT 1,071
356 T-Mobile Polska S.A. ORG-ITP1-RIPE 1,071
357 GlobalConnect AB GLEIF verified 1,070
358 OOREDOO TUNISIE SA 1,067
359 Telemach-NET 1,065
360 Vultr Holdings, LLC 1,057
361 PT. INDOSAT Tbk GLEIF verified 1,056
362 a34705506 1,052
363 SC13299 1,050
364 Taiwan Mobile Co., Ltd. 1,048
365 GEST-EAS 1,045
366 Turksat Uydu Haberlesme Kablo TV ve Isletme A.S. GLEIF verified 1,040
367 CHINANET-XZ 1,036
368 CS Loxinfo Public Company Limited 1,030
369 Indonesia Network Information Center 1,024
370 FASTWEB-AMPLIFON_ITALIA 1,023
371 CLOUDFLY CORPORATION 1,022
372 FOOT-LOCKER-EUROPE-B-V-GTT 1,021
373 Nombre-red 1,019
374 SUDATEL_FREE 1,013
375 GLOBAL COMMUNICATION NETWORK LIMITED 1,010
376 EVA-FIBER 999
377 PRIVATE JOINT-STOCK COMPANY "FARLEP-INVEST" 998
378 Etihad Salam Telecom CJSC 993
379 Battlestate Games Limited GLEIF verified 993
380 Ooredoo Q.S.C. 990
381 REALEITESGRUPPOEUROPEODIINTERESSEECONOMICO 990
382 KPN B.V. GLEIF verified 988
383 Hurricane Electric 987
384 CAPTURE-9-NET-IN 978
385 WideOpenWest Finance LLC GLEIF verified 977
386 PEG TECH INC 967
387 ATT-EIPAM 965
388 ratiokontakt GmbH 963
389 Hainan-TELECOM 960
390 Beam-BRAS-Pools 958
391 Rackdog LLC 953
392 CLOUVIDER-HB-CLIENT-997 950
393 Masergy Communications, Inc GLEIF verified 948
394 Mobile Communication Company of Iran PLC 945
395 FR-NCNUMERICABLE 943
396 Ace Data Centers II, L.L.C. 941
397 IBM Cloud GLEIF verified 940
398 Meta 938
399 FASTVPS EESTI OUE FASTVPS-EESTI-OUE 936
400 BRASIL TECPAR / AMIGO / AVATO 934
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