Century City tops SA mobile speed rankings

1. From Muddy Hollow to Millisecond Marvel

A quarter-century back, the only thing that zipped through the dredged marshes of Century City was a colony of rats. Today the same 250-hectare patch hosts Amazon’s largest African edge node, Teraco’s 38 MW hyperscale hall, and - according to MyBroadband’s Q4-2025 audit - the fastest median mobile throughput ever logged on the continent outside a lab.

The precinct’s secret is a rare mash-up of geography, timing and tenancy. Planned after 1998, every boulevard already hides a 12-way duct stuffed with 144-strand fibre. When ICASA opened 3.5 GHz for 5G in March 2023, Vodacom, MTN and Rain simply fused drop-cables in existing manholes instead of ripping fresh asphalt. Within months a 3.2 km traffic-calmed ring - locals call it “the Golden Gigabit - carried thirty palm-sized small-cell poles, giving almost every flat, office and canal café an unobstructed view of at least two independent 100 MHz carriers.

Add a blanket 25 m building height cap and interference disappears; hand-over between poles finishes in 120 ms. Speed-test packets now clock 22 ms to Cape Town’s Cloudflare node - lower latency than most Johannesburg fibre lines.

2. The Invisible Backbone: Free Peering and Why It Matters

Headline figures collapse if the yard-stick wobbles. MyBroadband anchors its probes inside Teraco’s neutral cages, but the quiet hero is NAPAfrica’s Layer-2 fabric. Any operator - multinational or bedroom MVNO - receives a gratis 10 Gbps port provided it advertises a hundred prefixes. Because the port is symmetrical and zero-rated, carriers have zero incentive to haul user traffic to cheaper, far-off landing stations.

Seventy-eight percent of packets from Century City phones never leave the metro; Netflix, TikTok, Microsoft 365 and AWS Cape Town region are all one virtual hop away. A 175 Mbps download therefore reflects actual air-interface health, not the moodiness of a submarine cable thousands of kilometres away.

3. When the Suburbs Fight Back: Irene, Sandown and the Upload Boom

Centurion’s Irene estate grabs second spot at 152 Mbps. A two-kilometre circle encloses Vodacom’s innovation mid-campus and the CSIR’s 5G playground, so engineers trial 256-QAM uplink, four-band carrier-aggregation and 128-element Massive MIMO months before the rest of the country. ICASA even gifted the area an experimental 60 MHz sliver at 2.3 GHz, effectively an extra dedicated carrier. Residents joke their phones absorb firmware updates more often than banking apps.

Third-placed Sandown (146 Mbps) tells a different story: indoor 5G-mmWave repeaters fed by dark fibre. Atterbury, the property group, dropped a tiny 60 GHz back-haul node on every second level of the new Rosebank Link mall and invited all carriers to plug in for a flat rent. Shoppers hit 1.2 Gbps while ordering flat-whites, dragging the suburb-wide average upward even though outdoor macros plateau at 400 Mbps.

Downloads may dazzle, yet Century City also tops the upload chart at 36 Mbps - double the national cellular mean and triple a typical 100/10 Mbps fibre line. The leap comes from stand-alone 5G cores running on 35 % of Cape Town towers; MTN uses a 3:1 uplink-to-downlink slot ratio during office hours, turning the radio frame into a launchpad for 4K TikTok lives streamed straight from the canals. Nearby, a creator co-working space called The Workshop bulk-buys 5G SIMs, load-balances them and resells uncontended 50 Mbps symmetric links to YouTubers, nudging the neighbourhood average even higher.

4. Resilience, Townships and the Next Frontier

Rolling black-outs haunt South Africa, yet Century City rarely sags below 160 Mbps even during Stage-6 cuts. Landlord Rabie Property installed a 22 MW gas trigeneration plant beneath Canal Walk’s parking deck; every lamp-post radio receives 48 V DC from the same battery room and stays awake eight hours after the grid folds. Base-stations dial back from 100 MHz to 60 MHz to save watts, but because commuter numbers dive during outages the per-user experience hardly flinches.

An uplifting twist hides in the rankings: Langa (87 Mbps) and Khayelitsha Site-C (74 Mbps) muscled into the national top-100, outrunning many posh coastal suburbs. SA Connect Phase-3 funds operators to bolt 5G radios onto school roofs and clinics; municipally powered, rent-free towers let carriers run 60 MHz at full throttle. Learners handed 20 GB monthly e-SIM vouchers naturally speed-test their hearts out, hoisting their suburbs onto the leaderboard.

Could anything dethrone the reigning champ? A court ruling might freeze 28 GHz if broadcasters cry foul over future 8K satellite links, or Stage-8 load-shedding could exhaust even gas generators. Yet the likeliest spoiler is success itself: once 200 000 IoT sensors squat on the same poles, signalling storms could clog the control plane, forcing engineers to trade user speed for session density - the Tuchean paradox in which victory plants the seeds of congestion.

Watch the leaderboard, keep the test app updated, and remember: the next 175 Mbps suburb could very well be your own.

[{"question": "

How did Century City achieve Africa's fastest mobile internet speeds?

", "answer": "Century City became Africa's mobile capital through a combination of pre-planned fiber infrastructure, rapid 5G deployment, and strategic network architecture. Its unique design, including a 25m building height cap and free peering at NAPAfrica, minimizes interference and ensures efficient data transfer, leading to an average of 175 Mbps. The area was planned after 1998, with every boulevard already containing a 12-way duct stuffed with 144-strand fiber. When 5G spectrum became available in March 2023, telecommunication providers could quickly deploy 5G by simply connecting drop-cables in existing manholes, rather than undertaking extensive new construction. This led to rapid deployment of small-cell poles, ensuring widespread 5G coverage and minimal interference due to the limited building heights."},
{"question": "

What is 'free peering' at NAPAfrica and why is it important for Century City's internet speed?

", "answer": "Free peering at NAPAfrica's Layer-2 fabric is a crucial element. It means that any operator, regardless of size, receives a free 10 Gbps port if they advertise a hundred prefixes. This symmetrical and zero-rated port incentivizes carriers to keep user traffic local rather than routing it to more distant and potentially slower landing stations. As a result, approximately 78% of internet traffic from Century City phones never leaves the Cape Town metro, with major services like Netflix, TikTok, Microsoft 365, and AWS Cape Town region being virtually one hop away. This direct local access ensures that the reported 175 Mbps download speed accurately reflects the network's performance, rather than being influenced by the latency and moodiness of international submarine cables."},
{"question": "

How does Century City compare to other high-speed areas in South Africa, especially regarding upload speeds?

", "answer": "While Century City tops the charts at 175 Mbps download and 36 Mbps upload, other areas like Irene (152 Mbps) and Sandown (146 Mbps) in Centurion also boast impressive speeds. Irene benefits from being near Vodacom's innovation campus and the CSIR's 5G playground, allowing for early testing of advanced technologies. Sandown utilizes indoor 5G-mmWave repeaters fed by dark fiber, with shoppers experiencing up to 1.2 Gbps in certain retail areas. Notably, Century City's 36 Mbps upload speed is double the national cellular mean and triple a typical 100/10 Mbps fiber line. This is partly due to stand-alone 5G cores on Cape Town towers and MTN's 3:1 uplink-to-downlink slot ratio during office hours, facilitating high-bandwidth activities like 4K live streaming."},
{"question": "

How does Century City maintain high internet speeds even during South Africa's rolling blackouts (load-shedding)?

", "answer": "Century City demonstrates remarkable resilience during load-shedding. The landlord, Rabie Property, installed a 22 MW gas trigeneration plant beneath Canal Walk's parking deck. This plant provides power, ensuring that every lamp-post radio receives 48 V DC from the same battery room and remains operational for up to eight hours after the main grid fails. While base stations may dial back from 100 MHz to 60 MHz to conserve power, the per-user experience hardly flinches because commuter numbers also decrease during outages, balancing the network load. This robust backup power infrastructure ensures consistent high-speed mobile internet."},
{"question": "

Are there efforts to extend high-speed mobile internet to less affluent areas, and how are they performing?

", "answer": "Yes, there are significant efforts to extend high-speed mobile internet to less affluent areas, with uplifting results. Townships like Langa (87 Mbps) and Khayelitsha Site-C (74 Mbps) have muscled their way into the national top-100 rankings, even outrunning many traditionally 'posh' coastal suburbs. This progress is largely supported by SA Connect Phase-3 funding, which enables operators to install 5G radios on school roofs and clinics. These municipally powered, rent-free tower locations allow carriers to run 60 MHz at full throttle. Learners, often provided with 20 GB monthly e-SIM vouchers, actively speed-test their connections, thereby contributing to their suburbs' high rankings on the leaderboard and closing the digital divide."},
{"question": "

What potential challenges could Century City face in maintaining its top position or developing further?

", "answer": "While Century City currently holds the top spot, potential challenges could arise. A court ruling might freeze 28 GHz spectrum if broadcasters raise concerns about future 8K satellite links. More severe Stage-8 load-shedding could potentially exhaust even the gas generators. However, the most likely spoiler could be 'success itself' – known as the Tuchean paradox. If a massive number of IoT (Internet of Things) sensors (e.g., 200,000) begin to use the same poles, the signaling storms could clog the control plane. This would force engineers to prioritize session density over individual user speed, potentially leading to congestion. Additionally, as other suburbs invest in similar infrastructure and 5G advancements, competition for the top spot will intensify, making it crucial for Century City to continue innovating."}]